EOTVIA Step Drill Bit High Speed Steel Spiral Flute Cone Centering Drilling Tool With Hex Shank 4‑20mm Spiral Flute Step Bit High Speed Steel Drill Bit

Feature: 1. [118° X TYPE OPENING] The step drill is designed with 118° X type opening with accurate positioning and reducing drill bit slippage. 2. [DOUBLE SPIRAL FLUTES] Double spiral flutes greatly reduces drilling resistance with fast cutting and smoother chip removal. 3. [WITH HEX SHANK] With standard hex shank which is stable in installation not easy to slip or fall off during use. 4. [HIGH SPEED STEEL] Made of high speed steel material with high hardness and wear resistance not easy to deform or corrode. 5. [DRILLING THICKNESS] The drilling diameter is 4‑20mm which can be used for 2mm thin iron 2mm copper or aluminum plate 4.5mm wood or plastic etc. Specification: Item Type: Step Drill Bit Material: High Speed Steel Drilling Diameter: Approx. 4-20mm / 0.2-0.8in Drilling Thickness: 2mm thin iron (within 25 degrees of hardness) 2mm copper or aluminum plate 4.5mm wood or plastic plate Package List: 1 x Step Drill Bit