20mm Square Hole Drill Bits for Wood Woodworking Hole Saw Mortising Chisel Drill Bits

20mm Square Hole Drill Bits for Wood Woodworking Hole Saw Mortising Chisel Drill Bits
Orgry
sku: 2602050868
$23.90
Shipping from: United States
   Description
Specification: Material: High Speed Steel(HSS) Hardness: Up to HRC48~50 Size:6mm(1/5 ) - 25mm(1 ) Shape of hole: square rectangle Note: * Square hole drill can not be used on an electric drill drill square holes need to fit a square hole drill drilling (mortise and tenon machine) to use. * To avoid drill bits become overheated and get burned up due to fast rotary friction we suggest use cutting fluid to keep the bits cold during usage.
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