Features: _x000D_ 1. Sharp and durable carbide tip can be reused after grinding. _x000D_ 2. The hole diameter can be adjusted by the distance from the drill bit tip to the center. _x000D_ 3. Alloy steel with heat treatment can be used for thin-film plate. _x000D_ 4. Can be installed and operated on the electric drill and bench drill. _x000D_ 5. Widely used in wooden board, plastic board, gypsum board, etc. _x000D_ _x000D_ Specifications: _x000D_ Material: alloy steel _x000D_ Color: black _x000D_ Shape: airplane _x000D_ Hole diameter range: 30-200mm / 1.18-7.87in _x000D_ Weight: Approx. 450g _x000D_ _x000D_ Package Includes: _x000D_ 1 x Adjustable Hole Saw Drill Bit Set _x000D_ _x000D_ Note: _x000D_ 1. Before starting operation, check if all the screws are tightened. _x000D_ 2. Be sure to hold it during operation to prevent accidents. _x000D_ 3. When replacing the drill, it is necessary to cut off the power. _x000D_ 4. Cuttings generated during drilling should be cleaned by special tools rather than hand.