Features: This conversion head can transform electric wrench into impact drill, endowing the electric wrench with chiseling ability, meeting different work needs, and enhancing the practicality of the tool. Carbon steel, it have high hardness and strong wear resistance, ensuring stable operation under high load and extending its service life. The weight is only 140g and the size is 59x25mm. The small size design makes the conversion head easy to carry and suitable for home users and professional technicians. The installation process is simple and doesnot require complex tool to complete the conversion, suitable for 9mm square handle four pit drill bit. Suitable for mainstream electric tool on the market, it can be used for drilling holes in brick, concrete, stone, and other materials. Specifications: Material: Carbon Steel Size:Approx.59mm/2.32''x25mm/0.98'' Package Includes: 1Piece Drill Chucks Adapter note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.