DIY Supplies:Woodworking Description: 1. Material: carbon steel 2. Weight: 50 grams 3. Specifications: 12 mm, 16 mm 4. Scope of application: This product is suitable for the hole chamfering of plates with low hardness such as wood and plastic plates. Do not use this product to chamfer metal. 5. Packing: 2 plastic bags (one for each size)