Feature 1、Made of high quality carbide tipped metal material, very durable 2、Greatly replace the broken adapter with your drill chuck 3、Simple operation, easy to use, and fast perforated 4、Used for drilling walls, stones, bricks,or installation of air-conditioning etc 5、High-frequency welding technology, welding openings is very strong, smooth inside and outside welding mouth Features: 1. Made of high quality carbide tipped metal material, very durable 2. Greatly replace the broken adapter with your drill chuck 3. Simple operation, easy to use, and fast perforated 4. Used for drilling walls, stones, bricks,or installation of air-conditioning etc 5. High-frequency welding technology, welding openings is very strong, smooth inside and outside welding mouth Specifications: Material: carbide tipped metal Connecting Rod Length: approx. 200mm Hole saw Diameter: approx. 65mm Color: As the picture show Quantity: 1set Note: 1. Please allow 1-3mm errors due to manual measurement 2. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same Package Includes: 1 x Hole saw 1 x Connecting rod 1 x Drill bit 1 x Wrench