Feature: 1. With a self‑tapping thread at the top, drilled hole is a hole without tapping, drilling efficiency is higher. 2. Four grooves supports faster removal of sawdust and can be used for a long time, making woodworking drilling easier. 3. Exquisite craftsmanship, with conical flute support and hex shank, reduces the binding, makes the drill easy to use. 4. Compatible with many equipment, such as electric hand drill, rechargeable drill, bench drill, etc. (Just suitable for 24V high‑power model rechargeable drill.) 5. The drill bit can be also used as a cutter which can be sharpen and continue to use. 6. Manufactured from premium 42CR materials, durable and sturdy, less likely to damage. Specification: Conditon: 100% Brand New Item Type: Auger Drill Bit Material: 42CR Color: As Pictures ShownType: 18mm/0.71in, 20mm/0.79in, 22mm/0.87in, 25mm/2.0inApplication: Suitable for all kinds of softwood, hardwood, rubber, plastic. Package List: 1 x 18mm Drill1 x 20mm Drill1 x 22mm Drill1 x 25mm Drill Note: Just suitable for 24V high‑power model rechargeable drill.