Proper accessories: silver chuck with 2.7-inch length, compatible with bits from 0.3 mm to 6.5 mm; black chuck with 1.97-inch length, compatible with bits from 0.3 mm to 3.6 mm. Easy to use and install. Safe and efficient. Includes a 1/4-inch hexagon wrench for convenient operation. Features: These keyless drill chucks allow conversion of cordless screwdrivers into drills or grinders. Adjustments are made by rotating the rear collar for quick task switching and uninterrupted workflow. Essential accessories for power tools. Securely lock and release drill bits for fast conversion—convert hex shank drivers into drilling setups. Compatible with hex shank power tools using standard drill bits. Wide application range: Available in multiple sizes to fit most drills and cordless screwdrivers. Suitable for use in automotive, garage, warehouse, office, and home environments. Easy bit loading and unloading: This keyless chuck enables rapid transition from driving to drilling—within seconds. One-handed operation is supported, ideal for confined spaces. Material: Metal Color: Silver + Black Package Contents: 1 × Silver hex shank chuck (0.3–6.5 mm) 1 × Black hex shank chuck (0.3–3.6 mm) Note: The actual product color may vary slightly due to lighting conditions and screen settings. Measurement tolerance: ±1–3 mm.