Colton Industrial Tools 5 Pc. BXA Machinist Pro Quick Change Wedge Tool Post Set. For use on lathes with swings from 10″-15″ (defined as the diameter that can be turned over the bed). All steel construction (not aluminum). Precision ground and hardened. Quick and easy height adjustment. Set comes with: (1) BXA Wedge Type Tool Post, (1) #1 XL Holder, (1) #2 XL Holder, (1) #4 Holder, (1) #7 Holder. We also sell custom tooling packages!