Uxcell 18mm Drill Diameter Hinge Boring Bit Wood Hole Saw Product Name : Hinge Boring BIt; Suitable for : Wood Borer Drill Diameter : 18mm / 0. 7"; Shank Diameter : 7. 7mm / 0. 3" Total Length : 78mm / 3. 1"; Material : Metal Color : As Picture Show; Weight : 41g Package Content : 1 x Hinge Boring Bit