AS TOOL CENTER High-carbon steel Hollow Chisel Woodworking Square Hole Drill Bit
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"Square Hole Drill Bit ,12 mm 0.47 inch High-carbon steel Hollow Chisel Mortise Power Tool for Woodworkingspecification: size: 12 mm / 0.47 inchweight: 0.18kgproduct details:1.Square hole drillMade of high-carbon steel,through heat treatment , HRC48-50 (high hardness)2.Drill coreHigh carbon steel, precision manufacturing, Durable and unbreakable3.Drill sleeveThe drill sleeve entrance with radians is square hole drill the standard design,which greatly reduces the resistance of the drill sleeve.4.Chip Flute
