4-Piece Square Hole Drill Bit Set for Woodworking, 6.4mm / 8mm / 9.5mm / 12.7mm Wood Mortising Chisel Set for Carpentry, Construction, Decoration, and Industry

[Square Hole Size]: 1/4 inch / 6.4mm, 5/16 inch / 8mm, 3/8 inch / 9.5mm, 1/2 inch / 12.7mm. Refers to the edge length of the square hole drilled by the square bit.[Application]: This mortising chisel is ideal for drilling square holes in wood with a mortising machine or mortising attachment. mortise. Suitable for use in the wood, construction, installation and decoration industries.[Features]: Reduce the labor intensity of construction workers, speed up the speed of construction.[Material]: high strength and hardness, made of high quality material, wear resistance and easy to use.[Note]: other dimensions are shown in the picture. Please avoid 1-2mm errors due to manual measurement.Product DescriptionItem Descriptions:-[Square Hole Size] : 1/4 inch / 6.4 mm, 5/16 inch / 8 mm, 3/8 inch / 9.5 mm, 1/2 inch / 12.7 mm. Refers to the edge length of the square hole drilled by the square bit.-[Application]: This mortising chisel is ideal for drilling square holes in wood with a mortising machine or an accessory to mortise. Suitable for use in the wood, construction, installation and decoration industries.-[Features]: Reduce the labor intensity of construction workers, speed up the speed of construction.-[Material]: high strength and hardness, made of high quality material, wear resistance and easy to use.-[Note]: d other dimensions are shown in the picture. Please avoid 1-2mm errors due to manual measurement.Package:4pcs Square Drill Bit(Note: other accessories are not not included.)Item Specifications:Drill Bit Material:MetalClamp Shank Diameter:19mm/0.75inch