Features: brand new and high quality Clamping range: light weight, will not put for extra burden on your operation Quick Change: 1/4" hex shank mounts easier and more securely in power tools Easily convert your cordless electric screwdriver into a drill to quickly switch between tasks, reducing the for time required for projects Material: carbon steel Three-jaw collet 0.3-6.5mm, quick- change hexagonal shank collet Six styles to choose from according to your personal needs Specifications: Material: Alloy Size 1: 52x8.5x18.5mm/2.05x0.33x0.73inch Size 2: 52x8x18mm/2.05x0.31x0.71inch Size 3: 51x9.5x23mm/2.01x0.37x0.91inch Size 4: 74.5x30mm/2.93x1.18inch Size 5: 74.5x29.5mm/2.93x1.16inch Note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xElectric Grinder Drill Chuck