These locator clamps along with with Flex receivers are designed to be mounted on fixture bases and plates for accurate locating and positioning. Simple to operate with a quarter-turn of the knob, this locator allows for highly precise 0.003 mm repeatability and strong clamping force of 674 lbs. They are designed to be used with the ball-locking receptacles referenced on the table. The ball locking pin is mounted to the fixture and the receptacle is mounted to the base. When the knob is rotated, the balls on the pin expand and lock the fixture in place. Body made from 4140 steel with a nitrocarburized finish. Knob and piston made from made from 300-series stainless steel. Balls made from 4140 stainless steel.