Features For thin-film sheets, alloy steel with heat treatment can be used. Widely used in wooden board, plastic board, plasterboard, etc. The hole diameter can be adjusted by the distance from the drill tip to the center. Can be installed and operated on the electric drill and bench drill. Durable carbide tip can be reused after grinding. Specifications: Material: alloy steel. Colour: black. Shape: airplane. Hole diameter range: 30-300mm/1.18-11.81" Weight: approx. 534 g. Features: 1. Widely used in wooden boards, plastic boards, plasterboard, etc. 2. The hole diameter can be adjusted by the distance from the drill tip to the center. 3. Durable carbide tip can be reused after grinding. 4. Can be installed and operated on the electric drill and bench drill. 5. Alloy steel with heat treatment can be used for thin film plates. Package includes: 1 x Adjustable Hole Saw Drill Bit Set Note: 1. Before commissioning, check whether all screws are tightened. 2. Be sure to hold it firmly during operation to avoid accidents. 3. When replacing the drill, the power supply must be interrupted. 4. Drill chips that occur during drilling should be cleaned by special cleaning tools instead of hand. Package List