Made with chrome-vanadium steel for durability and the ability to withstand the high shock of impact drivers. Convert any air or wrench into a drill or ratcheting wrench into a driver with this single piece chuck converter. mechanism allows for easy, one-handed swapping between bits while working. Adapter securely holds /4" - bit; Eliminates the need for expensive driver sockets. Widely use for Automobile, mechanical maintenance and so on. Specification: Material: Steel Color: Black Type A Top Diameter: 12mm/ 0.472inch Bottom Diameter: 23mm/ 0.9inch Length: / 1.5inch Type B Top Diameter: 6.35mm/ 1/4" Bottom Diameter: 12.7mm/ 1/2" Length: 50mm/1.97" Package Includes: 1 Piece Converter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store