Make a hole in metal and wood objects easily using the Adjustable Circle Hole Saw Drill Bit Tool Set. This drill bit allows you to make a hole in any size you want with just one tool! It has a drill bit in the middle and two sharp alloy blades on both sides, which you can adjust for the hole size (from 30-300mm). Super easy and much more convenient to use! Easy to use and to operate Adjustable design Durable and strong For DIY projects It makes the job easier and faster For wood and metal use Specifications: Material: Steel body & Alloy headsAdjustable range: 30-300mmCutting Hole Diameter: 30-120mm, 30-200mm, 30-300mmCutting Depth: 30mmShank Diameter: 10mm (Suitable for 10mm diameter electric drill)Suitable for drill: Plywood, Laminates, Composite, Gypsum, Rubber, Plastic, Hardwood etc. Package Includes: 1 x Adjustable Circle Hole Saw Drill Bit Tool Set Note: 1. Due to the difference between different monitors, the picture may not reflect the item's actual color(s). We guarantee the style is the same as shown in the photos.2. Please, allow slight dimension difference due to different manual measurements.3. The measurement allowed error is +/- 1-3cm.