Use this 12 pc. set in conjunction with a slotted table surface of a milling machine or the like to hold down irregular shaped items when machining. Set includes: 2 ea. M6 x 1.0 threaded rods, 4” long. 2 ea. Flange nuts. 2 ea. 8mm “T” nuts. 2 ea. Coupling nuts, 5/8” long.