High-quality material: These grinding wheels are made of high-quality 45# steel, which is very durable and wear-resistant. Versatile compatibility: Designed to fit standard 115mm or 125mm angle grinders with a universal bore diameter of 22.2mm, providing wide compatibility. Various disc styles: The set includes flat, bevel-shaped, small arc-shaped, and large arc-shaped discs, providing multiple options for shaping, carving, sanding, and polishing tasks. Wide range of applications: Ideal for root carving, grinding, shaping, polishing, deburring, etc. Efficient and high performance: With fast sawdust removal capability, these wood grinding wheels save energy and improve work efficiency, making them an excellent tool for wood carving enthusiasts.