? [PREMIUM MATERIAL]- 5 PCS rotary wood rasp set made of premium high-speed steel material with surface treatment, tough, sharp and durable, ensuring long service life; ? [5 HEAD SHAPES]-5 different cutter shapes- Ball, Oval, Cylinder, Large and Small cone are included in the package to satisfy your various needs; ? [SHANK SIZE]-All 5 wood rasp drill bits have a 1/4” (6MM) Shank ? [GREAT FOR WOODWORKING AND WOOD CARVING]- Used for grinding, polishing, shaping, reaming and burnishing soft wood, plastics and rubber surfaces. Ideal rotary file burr set for DIY woodworking job. ? [NOTE]- This rotary set works well for soft wood. Don’t apply them to hardwood or metal.