Detailed Product Description HSS Annular Cutter ( Rail drill ) Material: HSS ( M2 M35 available ) Size:Depth: 25,35,50,75,100mm; Diameter:12-65mm Shank type: 1. Welden Shank & One Touch Shank & Quick-in Shank & Thread Shank 2. Size of Shank 19mm &32mm * TCT annular cutter is also available Its performance and efficiency are much better than normal drills, hole saw etc.