Klein Tools | 4-in-1 SAE Impact Flip Socket | Cold-Forged Impact Rated
The Klein Tools A-651QS is a 4-in-1 SAE impact flip socket carrying four hex sizes in a single colour-coded body. The A-651QS covers 1/4", 5/16", 3/8", and 7/16" hex fasteners, and takes a 1/4" quick-connect shaft for impact drivers. It is supplied with a 3.5 inch impact extension and is cold-forged for high-torque work.
Working through a switchboard or a repetitive run of fixings normally means interrupting the sequence to exchange sockets whenever the fastener size changes, and a socket dropped into a ceiling cavity is unrecoverable. The A-651QS consolidates four hex sizes into a single socket body, and the spring-loaded flip mechanism alternates between them without a second hand or a separate loose socket to track.
Electricians and general trades keep one socket permanently mounted on the driver rather than carrying a tray of individual sockets. Laser-etched size markings and colour identification confirm the selection without inspection under torchlight, and the deep-well configuration travels down over extended thread and recessed bolt heads where a conventional shallow socket bottoms out prematurely.
Features
- Four hex sizes in one socket — 1/4", 5/16", 3/8", and 7/16" SAE hex combined into a single flip socket body.
- Spring-loaded flip action — switches between the small and large hex sizes hands-free, without pulling the socket off the driver.
- 1/4" quick-connect shaft — seats into standard 1/4 inch hex impact drivers and holds under torque.
- Impact rated — cold-forged steel construction is built for impact driver use rather than hand-ratchet only.
- Deep-well design — the socket runs down over extended thread and recessed bolts where a shallow socket bottoms out.
- Colour-coded body — colour identifies the socket at a glance in a tool bag or on a bench.
- Laser-etched size markings — the size markings are etched rather than printed, so they stay legible with use.
- 3.5 inch impact extension supplied — the extension reaches fasteners set back from the surface.
- SAE sizes only — the A-651QS covers imperial hex sizes and does not include metric sizes.
- Four sizes fixed to this socket — the size range is set at 1/4" to 7/16" and cannot be extended by adding inserts.
Where to use
- Switchboard and enclosure assembly — hex-head fixings on boards, enclosures, and mounting rails across the common small sizes.
- Fixings into masonry and timber — hex-head screws and coach screws driven with an impact driver.
- Overhead and ceiling-space work — the A-651QS keeps four sizes on the driver, so there is no loose socket to drop from a ladder.
- Strut, tray, and conduit support installs — repeated hex fixings where the size changes between bracket and fastener.
- Maintenance and service calls — one socket covers the common small hex range without carrying a full socket tray.
- Recessed and extended-thread fixings — the deep-well body clears long thread that a shallow socket cannot reach.
The A-651QS covers SAE sizes only, so metric hex fasteners need a separate metric socket. The size range is fixed at 1/4" to 7/16" and does not extend to larger hex fixings. The 1/4" quick-connect shaft suits hex impact drivers, not square-drive ratchets.
