Description:Designed with the long drill core and square chisel, this drill bit can help complete kinds of cutting works more easily and quickly.Comes with the high-end material, heat treatment and exquisite workmanship, this square hole drill bit has the advantages of higher hardness, rust and corrosion resistance.This square hole drill bit is made of high speed steel material.There are the square hole bits with different sizes of 14 to 30mm that you can choose.It is suitable for woodworking, carving and so on.Item Name: Square Hole Drill BitMaterial: High Speed SteelFeatures: Wear-resistant, Multifunctional, High HardnessSize Details: 14mm/15mm/16mm Drill Bit Size: 22cm x 2.5cm x 2.5cm/8.66" x 0.98" x 0.98" (Approx.)18mm/19mm/20mm/22mm Drill Bit Size: 22cm x 3.3cm x 3.3cm/8.66" x 1.29" x 1.29" (Approx.)25mm/30mm Drill Bit Size: 22cm x 4.3cm x 4.3cm/8.66" x 1.69" x 1.69" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x 14mm Drill Bit or1 x 15mm Drill Bit or1 x 16mm Drill Bit or1 x 18mm Drill Bit or1 x 19mm Drill Bit or1 x 20mm Drill Bit or1 x 22mm Drill Bit or1 x 25mm Drill Bit or1 x 30mm Drill Bit