SaferCCTV Square Hole Drill Bits for Wood, 4Pcs Woodworking Mortising Chisel Set Bit 1/4-Inch, 5/16-Inch, 3/8-Inch, 1/2-Inch

Reduce labor intensity of construction workers, speed up the construction speed, reduce construction costs for construction, installation, renovation, decoration industries.Mortise chisel 1/4-Inch, 5/16-Inch, 3/8-Inch, 1/2-InchSpecifications: - Material: HSS - Hardness: HRC 48~50 - Holder diameter: 19mm (circular) - Slotting flute diameter:3/4" - Total weight: approx 800g Package Included: - 4 x Tenon Hole Drill Bit

• 1. This Mortising Chisel set is great for drilling square holes in wood with a mortising machine. <b>NOTE: If for drill press to use, must have a Mortising Attachment (NOT INCLUDED).
• 2. Square hole drill bit set fits mortising attachments with 3/4" collars. Our woodworking morstising chisel bits set Only use for the opening square hole and keyhole drill -- Square hole drill can not be used on an electric drill, bench drill, drill square holes need to fit a square hole drill drilling (Mortise and Tenon Machine) to use.
• 3. Material: high-speed steel, Hardness: 56HRC
• 4. Set of 4: 1/4-Inch, 5/16-Inch, 3/8-Inch, 1/2-Inch
• 5. Use matters: Square hole drill is mainly used for woodworking aspects.