CMT 310.100.12 Dowel Drill, 10mm (25/64-Inch) Diameter, 10x27mm Shank, Left-Hand Rotation 22mm (7/8-Inch) cutting length, 57mm (2-1/4-Inch) overall length. Premium quality super-strength steel body and spiral portion with center point. 2 cutting edges, 2 spiral flutes, 2 negatively ground spurs. Used on boring machines alone or with chucks. For drilling blind holes in solid wood, wood composites, plastic and laminated materials.