This Rotary Rasp Set is an indispensable and necessary tool for carpenters, DIYers, and woodworkers, and is also great for home repair work. These rotary rasps are commonly used for grinding, polishing, shaping, decorating and burnishing wood. However, as you can see in the video, you can also use them to work with plastics, rubber, foam boards, aerated concrete, and even sheet metal! Quality & Versatility This rotary rasp set includes 5 popular rasp shapes: ball, oval, cylinder, short cone, and long cone. You can choose between two 1/4" shank and one 1/8" shank sets. Made of durable carbon structural steel 10x higher processing efficiency than with a regular file Double groove design Fits most small rotary tools and die grinders (1/4" and 1/8" collets) Details Material: Structural Carbon Steel Designed for: Wood, plastics, rubber, foam board, aerated concrete, sheet metal Quantity: 5pcs (1/4 inch) or 6pcs (1/8 inch) Shank diameter 1/4 inch / 6.35 mm or 1/8 inch / 3.175 mm Length: 2-2.4 inch / 50-60 mm Package contains: 1 x Rotary Rasp Set (5 pcs)