Features: brand new and high quality Converts chuck adapter of rotary hammers for increased versatility. Easy to install. Save for time and convenient for operation. Made of high-quality tungsten steel materials, practical and durable. Widely used by craftsman. With strict quality control and quality assurance, high safety factor, can be used with peace of mind. Specifications: Material: Tungsten Steel Color: for Grey/Black Type: Electric Wrench to Electric Hammer Drill Adapter for Grey/Square Shank to Round Shank Drill Adapter Black/Electric Hammer Turning Round Shank Electric Hammer Drill/Deep Groove Electric Hammer to Round Shank Adapter for Grey/Deep Groove Electric Hammer to Round Shank Adapter Black Electric Wrench to Electric Hammer Drill Adapter Size: approx 88x34mm/3.46x1.34 inches Square Shank to Round Shank Drill Adapter Size: approx 170x42mm/6.69x1.65 inches Electric Hammer Turning Round Shank Electric Hammer Drill Size: approx 220x34mm/8.66x1.34 inches Deep Groove Electric Hammer to Round Shank Adapter Size: approx 200x34mm/7.87x1.34 inches Deep Groove Electric Hammer to Round Shank Adapter Size: approx 222x42mm/8.74x1.65 inches Package Includes: 1x Electric Hammer Drill Adapter note: 1.Please allow 1-3cm 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.