HSS Woodworking Chiseling do Drill Attachments DIY Woodworking 6pcs Description: [Material]: do wood drilling tools are made of steel, high hardness, strong and durable. Heat treatment, high hardness, elongated core, high concentricity, long service life. [Convenient chip removal]: Auger Mortising Drill ma standard chip removal design, which can easily remove the side of wood chips and improve drilling efficiency [Wide Application]: Square hole fits do all do slotting machines and do drill attachments. Square drill bit is mainly used do woodworking. [Easy to use] chiseling consists of two parts, round core drilling and square drilling (as shown in the picture). During installation, these two parts must be held firmly za clamp. Specification: 6 pieces specification: (6.4mm/8mm/9.5mm/12.7mm/14mm/16mm) Specification 5 pieces: (6.4mm/8mm/9.5mm/12.7mm/16mm) Size Chart: The package includes: Optional package 6pcs or 5pcs square drill hole