Item Type: Square Hole Drill Bit Material: High Speed Steel Uses: Professional Square Drill Bits, Suitable for Drilling and Mortising Grooves in Low-Hardness Materials Such as Density Boards, Pressboards, Plastics, Hardwoods, Etc. in the Process of Construction, Installation and Decoration. 1Square hole drill is made of high speed steel. The blade is incisive and wear?resistant. The whole heat treatment has high hardness and long service life. 2U?shaped design of the drill sleeve is convenient for drilling and discharging wood chips to improve the drilling efficiency. 3Using a square hole drill, mounted on a camphor machine, makes the square hole faster and more accurate than using chisels or other manual methods. 4Professional drill, suitable for construction, installation, decoration, decoration and other industries, square drill set to meet most needs. 5Accelerate the construction speed, reduce the construction cost of construction, installation, decoration, decoration and other industries.In normal use, don't try to mold at one time, but need to press and lift multiple times. This will not only help the drill bit to discharge sawdust, drill a suitable square hole, but also protect the drill bit.1 x Square Hole Drill Bit 1 x Plastic Box