uxcell Gold Tone Round Shank Titanium Coated 9 Step Drill Bit 4-20mm Product Name : Step Drill Bit;Material : Metal Color : GoldTone;Shank Size : 8 x 22mm/ 0.3" x 0.87"( D*T ) Step Quantity : 9;Cutting Dia : 4-20mm/ 0.16"-0.8" Total Length : 74mm/ 2.9";Weight : 55g Package Content : 1 x Step Drill Bit1 x Plastic Case