Caution: Minor differences in product design may result in different model numbers. Please check the picture carefully to see if it matches your product. Securely holds 1/4 – 5/8 square diameter tool bits. Interchangeable with Dorian, Aloris, & Phase II BXA series tool posts. For use with BXA tool posts 250-200 or 250-222. Precision ground and hardened. Completely sealed for maintenance free operation. Turning and facing tools can be locked together (saving time and labor when changing operations). ALL-CARB 10Pcs BXA #1 250-201 Quick Change Tool Post Holder Turning & Facing. The Product Has Passed Strict Quality Testing. Durable And Easy To Install And Replace. Cost-effective, Good After-sales Service. Quality Assurance For Your Peace Of Mind. This product offers the best after-sales service. We are committed to providing you with durable and high quality products. Thank you for choosing our products! 10Tool Post Holder 250-201. 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.