Features 1、The thickened drill core blade makes wood chips discharge smoothly, make drilling faster. 2、Help to reduce the labor strength of construction workers and speed up construction speed. 3、Made of high quality high speed steel material with high hardness, which is durable in use. 4、Reduce the cost of construction, installation, renovation, decoration and other industries. 5、Unique chip discharge mouth for efficient wood chip removal, improve drilling efficiency. 6、The large-angle U-grooves cutting edge greatly improves the hole-opening efficiency. 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