Features: 1. Designed for professional use, the Heavy Duty Circle Cutter will make clean cuts. 2. Better and Faster - The tempered steel body features marked graduations on the beam for fast measurement and application. 3. Multipurpose - Will cut plywood, laminates, composite boards, gypsum board, plastic, dry wall, rubber & many other materials. 4. Great Value - This round shank circle cutter is great for making smooth cuts through most materials, including wood, composite, dry wall, Sheet, metal and more. 5. Easy To Adjust - Adjust diameter of hole by locating the inner part of the cutter holders against the graduated scale. 6. Changeable Center bit for thinner or thicker materials. 7. Slide Bar marked in graduated metric for precise adjustments. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Specification: Material: carbon steel Cutting diameter (mm): 40-300 Handle diameter (mm): 10-13 Chip flute length (mm): 50 Useful length (mm): 30-300 Overall length (mm): 120-300 Cutter length: 120-300 (mm) Full length : 150 (mm) Shank diameter : 10-13 (mm) Cut holes: 30 mm - 300 mm includes:1 x hole opener 1 x wrench 2 x alloy blades