Made of alloy material. This is a woodworking hole saw, it can be used for all kinds of wood, wood products and other materials. These hole saws can cut through wood, gypsum board and plastic with high precision. Features - Color: As Shown. - Material: Alloy. - Size: About 19x10x4.5cm. - Can be used for a variety of wood, wood products, plastics, gypsum board and other materials. - Made of alloy material, practical and durable. - This woodworking hole saw, mooth rotation and light operation. - Widely used in DIY speaker perforating, light perforating, woodworking perforating, plastic board perforating, etc. - Suitable all kinds of hand electric drills, it can also be used to complete the hole manually.