Features Widely applicable: can be installed and operated on the drill. Widely used in wooden board, plastic board, plasterboard, etc. Strong practicality: alloy steel with heat treatment can be used for thin film plates. Make your life easier: the hole diameter can be adjusted by the distance from the drill tip to the center. Good quality: precise and durable carbide tip can be reused after grinding. EXCELLENT CUSTOMER SERVICE We care about the feelings of every customer. If this product does not meet your expectations, please do not hesitate to contact us. We will do our best to serve you. Specifications: Material: alloy steel. Colour: silver. Shape: airplane. Hole diameter range: 30-300 mm/1.18-11.81 inches. Weight: approx. 518 g. Package includes: 1 x Adjustable Hole Saw Drill Bit Set Note: 1. Before commissioning, check whether all screws are tightened. 2. Hold it firmly during operation to avoid accidents. 3. When replacing the drill, the power supply must be interrupted. 4. Chips that occur during drilling should be removed from special tools instead of hand. Package List