Set includes: 1 x 250-000 Wedge Type Tool Post, 3 x 250-001 Turning Tool Holders, 3 x 250-002 Boring, Turning Tool Holders, 1 x 250-004 Heavy Duty Boring Bar Holder, can use two sizes boring bar 3/8 Inch and 1/2 Inch, 1 x 250-007 Parting Blade Tool Holder, use 1/2 high parting blades, 1 x 250-010 Knurling and Turning Tool Holder. Application: Mini lathe of 6-9swing. Material: Made of steel. All working parts are hardened and ground steel. It is completely sealed for maintenance-free operation. Features: No time wasted with shims. Wedge type tool post Have the Maximum rigidity to get the chatter free performance. Accuracy: Wedge type tool post are precision engineered to assure repeatability accuracy. Advanced design provides built in quick tool changing versatility with positive rigidity to meet the most exacting working tolerances. Stud size is M10 and is perfect for most mini lathes, although modification may be needed for some machines (a bushing or new center stud for a smaller hole may be necessary).