Hardinge N2 Round Smooth Bridgeport Collet, 1/4" Hole Size Collet for holding workpieces in a lathe or other machine tool Round smooth collet with an overall length of 1, a diameter of 23/64, and a capacity of 1/4 Fits Bridgeport N2 spindles Internal 10-32 x 3/8 draw bar threads are heat treated for long life Hardened and ground spring steel for accuracy and resistance to wear and breakage