Specially designed forstner bits for cutting telephone and Computer wire grommet access holes in office furniture. All tools feature precision ground and tempered tool steel, Multi-tooth cutting edges for faster cutting and chip removal, and massive Cutter body to dissipate heat and resist burning., #FO-562, (D) diameter: 2-3/8 (60mm), (D) shank: 1/2, overall length (L): 6, FO-562 Multi-tooth high carbon steel forstner bit 2-3/8 dia x 1/2 inch Shank