Specification Condition: 100% Brand New Item Type: 1/4in Drill Bit Material: High Speed Steel Color: Silver Application: Used for square hole machine Total Length: Approx. 179mm / 7.0in Shank Diameter: Approx. 4.5mm / 0.18in Slotting Depth: Approx. 44mm / 1.7in Clamping Diameter: Approx. 20mm / 0.8in Square Hole Diameter: Approx. 5mm / 0.20in Package List 1 x Drill Bit 1 x Square Hole Drill Bit Bracket Note 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. This product is special and can not be used for machinery equipment such as table drill and electric hand drill.