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        Learn more by watching our Lerin LTSB-12 | SharpEdge Flat Spade Bit 12mm Heavy Duty video.

        Additional related video.

        Additional related video.

        Lerin | SharpEdge Flat Spade Bit 12mm Heavy Duty | High Carbon Steel Hex Shank

        The Lerin LTSB-12 is a 12mm flat spade bit for boring through timber with a corded or cordless drill. It is manufactured from high carbon steel with full-length heat treatment, and finished in black oxide to resist corrosion. The LTSB-12 carries a hex shank, a precision-ground centre point, and a chisel edge ground at a positive angle for fast starts in softwood and hardwood.

        Not every timber penetration happens in a solid stud. Architraves, battens, thin linings, and narrow sections split or blow out when the bit is wider than the member comfortably accommodates. The LTSB-12 is the smallest diameter in the Lerin SharpEdge range, which keeps the cut proportionate to lighter stock. Its precision-ground centre point anchors the position before the cutting edge engages, so the hole lands where it was marked.

        Control matters more than speed on this diameter, and the LTSB-12 gives an operator room to work carefully. The narrow cutter demands modest torque, so the drill stays manageable one-handed and the bit can be eased through the final few millimetres where breakout happens. Full-length heat treatment keeps the slender shaft true, and the black oxide finish resists the corrosion that pits a small bit rattling loose in a tool bag.

        Features

        • 12mm cutting diameter — the smallest diameter in the Lerin SharpEdge range, matched to lighter timber sections and tighter penetrations.
        • High carbon steel construction — the LTSB-12 is manufactured from high carbon steel, which takes and holds a fine cutting edge in timber.
        • Full-length heat treatment — treated along the entire bit rather than the tip alone, which keeps a slender shaft from distorting under load.
        • Precision-ground centre point — anchors the position before the cutting edge engages, so the hole finishes where it was marked.
        • Positively angled chisel edge — ground at a positive angle to start quickly in softwood and hardwood, including cuts made against the grain.
        • Hex shank — seats in a standard drill chuck or hex bit holder and resists rotating in the jaws under load.
        • Black oxide finish — the coating on the LTSB-12 resists corrosion and reduces friction against the timber during the cut.
        • Chip-clearing geometry — waste evacuates from the hole rather than compacting behind the bit, which keeps the narrow flutes running freely.
        • Modest torque demand — the narrow cutter keeps the drill manageable one-handed, which helps when easing through the breakout face.
        • Hang hole — accepts a hook for storage, and takes a draw wire for pulling cable back through a freshly bored hole.
        • Timber cutting only — the LTSB-12 is a wood-boring bit and is not intended for masonry, steel, or tile.

        Where to use

        • Architraves and skirting — the LTSB-12 bores through trim and finishing timber where a wider bit risks splitting the section.
        • Battens and thin linings — suits lightweight members that cannot give up the material a larger diameter would remove.
        • Tight cable penetrations — opens holes sized close to the cable itself, keeping the opening neat where it remains visible.
        • Cabinetry and joinery — the LTSB-12 handles small penetrations through cabinet carcasses, shelving, and fitted joinery.
        • Pilot holes in hardwood — establishes a starter hole through dense stock before a larger bit or fixing follows.
        • Service and maintenance calls — covers the small everyday timber boring that comes up on repairs and minor alterations.

        The LTSB-12 is a timber-boring bit and is not intended for masonry, steel, or tile. High carbon steel holds a fine edge in timber, so striking embedded nails or screws will blunt or chip the cutting edge. Inspect the cavity for existing services and hidden fixings before boring, and treat a damaged edge as a replacement rather than a repair.

        (LTSB-12)

        The LTSB-12 is the smallest diameter Sparky Direct stocks in the Lerin SharpEdge range at 12mm. It suits lighter timber sections and tighter penetrations where a wider bit removes more material than the member can spare.

        The bit is manufactured from high carbon steel and heat treated along its full length rather than at the tip alone. It is finished in black oxide, which resists corrosion and reduces friction during the cut.

        The LTSB-12 has a hex shank, which seats in a standard drill chuck or a hex bit holder and resists rotating in the jaws. It runs from either a corded drill or a cordless drill.

        Back the workpiece with a sacrificial offcut where the bit will exit, and ease off the pressure through the last few millimetres. Letting the centre point emerge before the cutting edge follows gives the cleanest breakout face.

        Sparky Direct stocks the Lerin SharpEdge range in 12mm, 14mm (LTSB-14), 18mm (LTSB-18), 20mm (LTSB-20), 22mm (LTSB-22), 25mm (LTSB-25), and 32mm (LTSB-32). A three-piece 20, 22 and 25mm set is available as LTSB-SET202225.

        The chisel edge is ground at a positive angle for fast starts in softwood and hardwood. Hardwood cuts more slowly at any diameter, so run steady pressure and let the bit clear its waste rather than forcing the cut.

        The LTSB-12 is a timber-boring bit and is not intended for masonry, steel, or tile. Striking embedded nails or screws will blunt or chip the edge, so check the cavity for hidden fixings and existing services first.

        The Lerin LTSB-12 is available online from Sparky Direct, with Australia-wide delivery to any state or territory including regional areas. Sparky Direct is an Australian electrical wholesaler established in 2005, supplying more than 500,000 customers with transparent trade pricing.

        100-Day Fuss-Free Returns
        We want you to love what you buy—but if you change your mind, that’s okay too. That’s why Sparky Direct offers a 100-day money-back guarantee.

        • Items must be unused, with all parts, accessories, and original packaging.
        • We can’t accept returns if the product is damaged, incomplete, or not in resalable condition.
        • Proof of purchase is required.
        • Return shipping is the responsibility of the customer. 

        If your item isn’t in its original condition, please contact us before returning it—we might save you time and money.

        All products come with a manufacturer’s or supplier’s warranty

        • Warranty starts from the Invoice Date
        • Some suppliers offer in-home warranties and handle claims directly, so you won’t need to uninstall or return the product. Chat with us to check if your product qualifies.
        • Sparky Direct isn’t responsible for losses caused by product failure.
        • Warranties are void if products aren’t installed by a licensed electrician.

        Damaged or Faulty Goods
        If your order arrives damaged or is faulty, let us know within 24 hours.

        • Sparky Direct will pay for return shipping via an emailed return label.
        • If the fault is confirmed, we will send you a replacement item or provide a refund.

        Contact us via our chat to arrange the return.

        Exclusions
        We can’t accept returns for:

        • Items that have been installed, modified, or used
        • Clearance, End of life, Discontinued, or special order items (unless faulty)
        • All PPE Items
        • Goods returned without original packaging or proof of purchase

        How to Request a Return

        1. Contact our customer service team with your order number.
        2. Confirm it’s eligible under our return or warranty policy.
        3. Pack the item securely and return it using a trackable service.
        4. Once we receive and inspect it, we’ll process your refund or replacement.

        Warranty starts from Invoice Date

        Warranty Method: Return to Sparky Direct

        These specifications and characteristics outline physical, mechanical, electrical details.

        Brand LERIN
        SKU LTSB-12
        Model # LTSB-12
        Barcode # 9309002686016
        Package Weight 0.045kg
        TYPE VALUE
        Type Tools
        Brand LERIN
        Range SharpEdge
        Size 12mm
        Material High Carbon Steel
        Shank Type Hex

        Electrical and HVAC products sold by Sparky Direct are intended for installation by licensed and appropriately qualified professionals in accordance with applicable Australian Standards and regulatory requirements. Customers are responsible for ensuring that any product purchased, including any related or associated components, is compatible and suitable for their intended installation and application.

        Sparky Direct does not provide installation advice and does not assess product suitability for individual circumstances unless expressly confirmed in writing. Customers must confirm correct product selection, compatibility, compliance, and suitability with a licensed or appropriately qualified professional prior to purchase.

        Tools sold by Sparky Direct must be used safely and in accordance with the manufacturer’s instructions. Customers are responsible for ensuring they have the necessary knowledge and competence to operate any tool purchased. If you are unsure how to safely or correctly use a tool, do not use it and seek guidance from the manufacturer or a suitably qualified professional.

        Nothing in this clause limits or excludes any rights or guarantees available under the Australian Consumer Law.

        For website terms and conditions https://www.sparkydirect.com.au/terms-of-use

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