No time wasted with shims. All working parts hardened and precision ground. Wedge type tool post are precision engineered to assure repeatability accuracy. Wedge type tool post Have the Maximum rigidity to get the chatter free performance. Suitable for lathe center height 0.6 – 1.75″ (top compound surface to lathe center line), such as: South Bend 9″ & 10″, Atlas 10 & 12″, Delta 10 &11 Nardini TT1000 & TT1200 and many other import lathes. Whole set includes one each of. 6Pcs AXA 250-100 Piston Quick Change Tool Post Holder Set For Lathe 6 – 12. 250-100 Wedge Type Tool Post. 250-101 Turning Tool Holder, use tool bit up to 1/2. 250-102 Boring, Turning Tool Holder, use tool bit up to 1/2″ and round shank tool bits up to 7/16″. 250-104 Heavy Duty Boring Bar Holder, use 5/8 and 3/4 shank boring bars. 250-107 Parting Blade Tool Holder, use 1/2 high parting blades. 250-110 Knurling and Turning Tool Holder. 1pc Tool Host and 5pcs Tool Holders. Quick Change Tool Post. And our office is closed on Sunday and we apologize for the late reply during the holidays. We will do everything we can to give you a satisfying solution. We do our best to resolve any issue. So please talk with us and we will not let you down. FEEDBACK IS VERY IMPORTANT TO US.