QISF 4Pcs Woodworking Square Hole Drill Bits,Mortise Chisel Hole Saw Drill Bit Set 1/4-1/2-5/16-3/8 inch

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  • DESIGNED Professional Great for drilling square holes in wood with a mortising machine or a mortising attachment.Fits all mortising machines and drill press attachments. Square hole drill is mainly used for woodworking aspects.
  • MATERIAL & SIZE Made of high-speed steel. Heat treatment, HRC48 50, high hardness, lengthened core, high concentricity; 4 Different size include 1 4" (6.35mm), 5 16" (7.94mm), 3 8" (9.5mm), 1 2" (12.7mm)
  • WHY CHOOSE THIS ITEM Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries.
  • PACKAGE CONTENT 1Pcs 1 4" (6.35mm); 1Pcs 5 16" (7.94mm); 1Pcs 3 8" (9.5mm); 1Pcs 1 2" (12.7mm)
  • NOTE The square hole punching needs to use electric drill, hammer & other tools.(All of these are not include)

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