uxcell 120mm Length 20mm Borer Diameter Hinge Boring Bit Drilling Hole Tool Product Name : Hinge Boring BIt;Material : Metal Color : Silver Tone, Blue;Borer Drill Diameter : 20mm/ 0.787 Shank Diameter : 9mm/ 0.35;Total Length : 120mm/ 4.7" Net Weight : 72g Package Content : 1 x Hinge Boring Bit