FEATURES: Various existing bits, can only process a circular hole, square hole can not be processed, to machining square hole, must drill the hole or cutting machine processed crude hole, then chisel made from artificial hand. This utility model in the hole drilled by the rotary body, while the impact of the use of hammer impact force transmitted to the outer body, the material crushing round hole and square head wall, a one-time processing of a square hole, and the dust can be broken slag discharged from the tube. Using different specifications of the square hole drill, matching the appropriate power of the square hole machine, you can play a square hole to meet the requirements. Professional wood drill, suitable for construction, installation, decoration, decoration and other industries. Specifications: Material: HSS ;Hardness: HRC 48~50 Holder diameter: 19mm (circular) ;Drilling core length: 200mm Slotting flute diameter:1/4 Inch (6.4mm), 5/16 Inch (8mm), 3/8 Inch (9.5mm), 1/2 Inch (12.7mm), 9/16 Inch (14mm), 5/8 Inch(16mm). Package Included: 1 x 5/8-inch (16mm) 1 x 9/16-inch (14mm) 1 x 1/2-Inch(12.7mm) 1 x 3/8-Inch(9.5mm) 1 x 5/16-Inch(8mm) 1 x 1/4-Inch(6.4mm)

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. 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. 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. Material: Made of high-speed steel,Heat treatment, HRC48~50, high hardness,lengthened core,high concentricity. 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).

Tool Flute Type: Straight. Brand: Dele. Shank Type: Square. Material: High Speed Steel. Best Sellers Rank: See Top 100 in Tools & Home Improvement. : B08RCGMD31. Manufacturer: Dele. Date First Available: December 27, 2020. Item model number: ttand-021. Package Dimensions: 9.72 x 6.26 x 2.05 inches; 2.4 Pounds.