Model Number: 250-001 Turing and Facing holder bits range: up to 1/2inchMatched Post: 000 Wedge type PostCan't use with Mini Aluminum Quick Change PostFor use with 0XA post 250-000 up to 8inch swing. Securely holds up to 1/2inch square diameter bits Interchangeable with for Dorian, Aloris, and Phase II series mini posts.While we guarantee your satisfaction, these especially work best with our matching postscolour:blackMaterial: SteelPackage Contents:2 * Turning and Facing HolderOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.