Specifications: Material: alloy steel Color: black Shape: airplane Hole diameter range: 30-200mm / 1.18-7.87in Weight: Approx. 450g Package Includes: 1 x Adjustable Hole Saw Drill Bit Set Note: 1. Before starting operation, check if all the screws are tightened. 2. Be sure to hold it during operation to prevent accidents. 3. When replacing the drill, it is necessary to cut off the power. 4. Cuttings generated during drilling should be cleaned by special tools rather than hand.