length : as picture showsis_customized : YesUse : Wood DrillingMaterial : High Speed SteelModel Number : DB025MGFK64DIY Supplies : WoodworkingType : Gun Drill Bit Name : xcanOrigin : Mainland ChinaCertification : CEXCAN Square Drill Bit Square Hole Saw 6.4-25mm Mortise Chisel Wood Drill Bit HSS Hole Cutter with Twist Drill Wood Drilling ToolFeatures:1. This Mortising Chisel is great for drilling square holes in wood with a mortising machine or a mortising attachment.2. 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.3. Mortise and tenon square hole drilled by the terrible + outer sleeve in the middle of the combination.4. Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries.Specification:Type: Square Drill BitMaterial: High Speed SteelHRC: 56NotePlease allow 1-3mm error due to manual measurement.Due to the difference between different monitors, the picture may not reflect the actual color of the item.Package Including:1pc Square Hole Saw