Description: Made of high quality Alloy tool steel 40Gr which is forged and has longer life, not Aluminum. Precision ground and hardened. Takes only a few seconds to change tools. High quality 10.9 grade galvanized screws which have 1 time longer life than others. Tool Post and Tool Holders No. 250-301 Turning Tool Holder, use tool bit 1/2 to 3/4. 250-302 Boring, Turning Tool Holder, use tool bit up to 3/4″ and round shank boring bars up to 3/4″. 250-304 Heavy Duty Boring Bar Holder, can use both 3/4 and 1 shank boring bars. 250-307 Parting Blade Tool Holder, use 3/4 high parting blades. 13-18″ Tool Post Set CXA 250-333 Wedge Quick Change M10×25 3/16″ Hex Key. Made of high quality Alloy tool steel 40Gr which is forged and has longer life, not Aluminum. 250-310 Knurling and Turning Tool Holder, use short tool bit 1/2 to 3/4. Wedge type tool posts are precision engineered to assure repetitive accuracy. Advanced design provides built in quick tool changing versatility with positive rigidity to meet the most exacting working tolerances. Quickly and easily installed on an engine, bench or turret lathe for a wide range of operations, from fine precise work to heavy duty cutting. Maximum rigidity for chatter free performance. Completely sealed for maintenance free operations. Height adjustment screw allows accommodating various center height of different lathe chuck. Feature: High performance, reliable quality. We work with every effort to provide quality products and professional service. Quick Change Tool Post Category: Quick Change Tool Post Sets Quick Change Tool Post Series: CXA Lathe Swing: 13″-18″ Quick Change Tool Post Type: Wedge Number Of Pieces: 6. Hex Key Size: 3/16 Set Screw Thread Size: M10×25. Includes: 250-333 tool post holder, 250-301 holder, 250-302 holder, 250-304 holder, 250-307 holder, 250-310 holder. Thank you for your understanding. 1 PC CXA Quick Change Tool Post (250-333). 1 PC CXA Turning and Facing Holder #1 (250-301). 1 PC CXA Boring Turning and Facing Holder #2 (250-302). 1 PC CXA Universal Parting Blade Tool Holder #7 (250-307). 1 PC CXA Heavy Duty Boring Bar Holder #4 (250-304). 1 PC CXA Knurling Turning & Facing Holder #10 (250-310). Quick Change Tool Post Category. Quick Change Tool Post Sets. Quick Change Tool Post Series. Quick Change Tool Post Type. Set Screw Thread Size. 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.