Mortice Chisel Set, 6 Pcs Steel Square Hole Drill Bit Sets, 6.35/8/9.5/12.7/14/16 mm Bits for Woodworking

6 Different Sizes: 6 pieces a pack with different slot diameter to meet your needs. This woodworking square hole mortise drill bit set comes with 6 different size: 1/4inch (6.4mm), 5/16inch (8mm), 3/8inch (9.5mm), 1/2inch (12.7mm), 9/16inch (14mm), 5/8inch (16mm) High Efficiency and Labor Saving: Square wood chisel drill bits with standard chip design, easy to remove the side of wood chips, improve drilling efficiency. Reduces the labor intensity of construction workers, accelerates construction speed, reduces construction costs for construction, installation, renovation, decoration. Usage: Square drill bit set will get double effect by matched use with mortise and tenon machine, the square hole punching needs to use electric drill, hammer & other tools. The square drill into the hole drilled by the rotating body, while the impact of the use of percussive force transmitted to the outer body, the material grinding round hole and square head wall, and the debris will be discharged from the tube to the same. High Hardness: This square mortising chisel set is made of special steel, heat treatment, HRC48-50, offers high hardness, lengthened and high concentricity. Widely used: This square hole drill bit is suitable for wood including MDF, plastic, chipboard, channel wood, pine wood, basswood, etc. Note: It is not suitable for processing metal, glass, concrete, plasterboard, etc. Professional drill bit, suitable for construction, installation, renovation, decoration industry, etc. Great accessory for mortising, chisel, and woodworking.