FEATURES

• Precise：Sharp edges and points make consistently clean cuts with exceptional efficiency. 
• Woodwork：Made specially to drill square holes on woods.

• Stainless Steel：Ground and hardened carbon steel for efficient performance and long life span.

• Quick and Easy：Use this tool set on compatible drills and get the perfect result within minutes.

• Revolutionary：Many of the existing chisels are only able to drill circle holes, and square holes need to be outlined and curved out manually. Now this tool set can precisely cut square holes with extreme efficiency and minimum manpower.

• Universal Usage：Compatible with almost every standard square hole drill drilling (mortise and tenon machine) to use. 

Specifications:

• Material: High-Speed Steel.
• Hardness: 56HRC.
• Clamping shank diameter:
  1/4 INCH (6.4MM)
  3/8 INCH (9.5MM)
  9/16 INCH (14MM)
  5/8 INCH (16MM)  
• Middle terrible diameter: Total length: 19.5 cm / 7.68 in; Diameter: 6.8 mm / 0.27 in
• Square hole drill cannot be used on an electric drill, drill square holes need to fit a square hole drill drilling (mortise and tenon machine) to use. Mortise and tenon square hole drilled by the terrible + outer sleeve in the middle of the combination.

Package Include:

• TYPE1: 1/4 INCH (6.4MM) + 3/8 INCH (9.5MM).
• TYPE2: 1/4 INCH (6.4MM) + 3/8 INCH (9.5MM) + 9/16 INCH (14MM).
• TYPE3: 1/4 INCH (6.4MM) + 3/8 INCH (9.5MM) + 9/16 INCH (14MM) + 5/8 INCH (16MM) .