Suitable for lathe center height 0.7 - 2.2" (Top compound surface to lathe center line), such as: South Bend 13", 14" & 1307, Delta 14", Logan 14" Emco: Elnomat13S, Harrison: 11,12 &13", Sheldon: 11 &13, Clausing: 1300 series, Monarch: 13, Nardini: MS1400 MS1600 Acer: 1340 and many other import lathes. Whole set includes one each of: 251-222 Wedge Type Tool Post 250-201 Turning Tool Holder, use tool bit up to 5/8" 250-202 Boring, Turning Tool Holder, use tool bit up to 5/8" and round shank tool bits up to1/2" 250-204 Heavy Duty Boring Bar Holder, can use both 3/4 and 1" shank boring bars.