uptodateprouducts 3pcs Woodworking Square Hole Drill Bit Set Mortise Chisel Bits for Carpenter DIY Woodworking Hole 8mm / 9.5mm / 12.7 mm
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Product Material: HSS; Hardness: HRC 48~50,long service life, the drill sleeve has a U-shaped design to facilitate the discharge of wood chips and improve the drilling efficiency.Holder diameter: 19mm(appr. 0.75inch).The size of the clamping drill sleeve of the square tenoning machine needs to be greater than 19mm (3/4 inch)Square Hole diameter: 8mm(5/16inch)&9.5mm(3/8inch)&12.7 mm(1/2 inch) ; Drilling core total length: 200mm(appr 7.88inch )Professional wood drill bit, suitable for construction, installation, renovation, decoration industry, etc. It is not suitable for processing metal, glass, plastic, concrete, gypsum board etc.Note: -- It need to be used with square hole drilling machines (square tenon machines). We strongly do not recommend using hand drills or ordinary drill stands (non-square tenoning machines) to match this drill bit to make square holes.
