Square Hole Drill Bit Sets with Adapter, Woodworking HSS Wood Mortising Chisel Countersink Bits Hole Saw Mortise Drill Bit Set, 6.4mm 8mm 9.5mm 10mm 11mm 12.7mm 14mm 16mm (7PCS)

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- Drills precise holes with little pressure 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 1 4 Inch (6.4mm), 5 16 Inch (8mm), 3 8 Inch (9.5mm), 2 5 Inch (10mm), 7 16 Inch (11mm), 1 2 Inch (12.7mm), 9 16 Inch (14mm), 5 8inch(16mm). you can chose the size you want.
- 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.
- MATERIAL This square mortising chisel set is made of special steel, heat treatment, HRC48-50, offers high hardness, lengthened core, and high concentricity. Clamp diameter range is about 38-55mm 1.50-2.17 inch. Coming with a screw for enhanced fixation.
- Practical Tool Great for drilling square holes in wood with a mortising machine or a mortising attachment. Square hole drill bit adapter can ensure accurate and stable drilling operations, mainly used for woodworking aspects, and it is easy to install and disassemble.
- Note This square hole drill bit adapter is not suitable for lithium battery electric drills and bench drills without round hole bearings. It s suitable for old-fashioned bench drills and household bench drills. If your bench drill needs to use a square hole drill bit, please use it with an adapter included in the set.
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