Description
Size: 1/4 Inch (6.4mm), 5/16 Inch (8mm), 3/8 Inch (9.5mm),1/2 Inch (12.7mm), 5/8 Inch (16mm), 9/16 Inch (14mm).Material: Mortise and tenon square hole drilled made of high-speed steel,Heat treatment, HRC48~50, high hardness,lengthened core,high concentricity..Application: Our woodworking morstising chisel bits suitable for drilling square holes in wood with a tongue-and-groove machine or tongue-and-groove attachment, and has a long service life, please rest assured to use..Drills precise holes with little pressure,reduce the labor intensity of construction workers, accelerate the construction speed, reduce the construction cost of construction, installation, decoration, decoration industry..Notice: Square hole drill needs to cooperate with square hole drill machine (mortise and tenon) use and can not use with electric drill, bench drill. Provide professional use tutorials. Please feel free to contact us if you have any question.Before you buy it, please kindly check whether it suits your needs.thank you!
