Set of 5 wood cutters, wood carving knife files. Hollowing/grooving/boring/peeling and grinding can be done. Precision machined for durability. Good hardness, impact resistance and long service life. Various shapes and sizes of drill bits, which can be installed and used flexibly. Spherical, cylindrical, denier, small cone, large cone. Universal round handle. The tightening is firm, and the machine that can tighten more than 6.3mm cannot be used. Scope: It is suitable for engraving chamfers/grooves/bores of soft materials such as wood and plastic. Product Name: Woodworking Rotary File; Product material: Steel; Product weight: 91g; Product packaging: Plastic bag packaging; Applicable devices: Only machines with a 6.3mm chuck or larger can be used; Scope of application: suitable for wood, plastic and other soft materials engraving/chamfering/grooving/reaming, etc. Specifications: total length * head length * handle width: spherical: 41*11.3*6.3 millimeters; cylindrical: 50*25*6.3 mm; denier: 50*25*6.3 mm; small cone: 46*22*6.3 mm; Large cone: 55*31*6.3 millimeters.