QUICK ACTING SCISSOR TYPE LATHE KNURLING TOOL HOLDER Shank: 1/2" x 1/2" Length: 6" Capacity: 1/16"-2 1/4" Includes 1 pair of 3/4" Medium Diamond Knurls Hardened Steel Knurls for longer life comes fitted in Knurling holders. Knurling pressure is absorbed between two knurls. Depth of knurling impression can be pre-set for production work before start of operation. FEEL FREE TO ASK ANY QUESTIONS.