6.4 or 8 or 9.5 or 12.7mm square hole drill bit auger steel drill longing for woodworking toolsApplication:Mainly used in woodworking, suitable for use in the construction, installation, decoration, and decoration industries.Specification:Model: 833749Name:Square hole saw tenon chiselMaterial: 45 steelSquare hole size: 6.4 or 8 or 9.5 or 12.7mmFeatures:This chisel set is perfect for drilling holes in woodReduce the labor intensity of construction workers, speed up construction, and reduce construction costs in the construction, installation, decoration,and decoration industries.Mortise attachment for 3 or 4 "collarUse: Matters for use: Square-hole drills are mainly used in woodworking.Square hole drills are used for square hole mortising machines. They are specifically designed for square hole drills and cannot be used for electric drills. Note:Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please allow 1-3cm difference due to manual measurement and slight color variation for different display setting