Genuine Wera 899/4/1 S universal bit holder, part number 05160981001, designed for 1/4" external hexagon drive bits as per DIN ISO 1173-C 6.3. This robust bit holder features a strong tension ring to ensure a secure and wobble-free fit of the bit, enhancing stability during operation. With a 1/4" hexagon drive, it is perfectly suited for use with power tools equipped with a corresponding 1/4" hexagon socket head drive. Measuring 50mm in length, this Wera bit holder provides reliable performance for a wide range of fastening applications.