ALS-SS-508, 9pc Spline Bristol Keys Short Arm Kit

Set of 9 short arm keys:
S-033-4, S-048-4, S-048-6, S-060-6,
S-069-4, S-072-6, S-076-4, S-096-6, S-111-6

The Bristol Spline Drive

Developed by Bristol, the multiple spline drive system is recognized by design
engineers as the superior method of transmitting torque because nearly 100% of
wrenching force is applied at right angles to the load bearing spline surfaces of the socket.

Other drive systems dissipate a significant amount of force into radial thrust,
tending to expand the socket rather than tighten the screw.

addresses the problems caused by other fastening systems such as cam-out, socket reaming and "rounding" of wrenches.

electromechanical instruments.

They required screws and wrenches that could stand up to industrial environments, vibrations, and frequent removal and resetting.

Bristol wrenches have been in continuous production in the United States since their original introduction.