1. Material: iron + aluminum alloy
2. The connecting rod is made of aluminum alloy, durable and easy to install
3. Round shank design can clamp the drill more tightly, not easy to shake and slip
4. Replacement shaft can be installed on the drill for sanding, cutting tiles, wood, metal polishing, etc.
5. Weight: 6mm about 100g, 10mm about 150g
6. Diameter of connecting shaft: 10mm triple flat handle, 6mm round handle