With ring magnet. For the hardest fastening jobs and impact drivers. For absorbing extreme spikes. With ring magnet to easily hold even long and heavy screws. Ring magnet can be slid back to bypass. With snap ring and magnetDrive: Suitable for bits 6.3 mm (1/4”) hexagon head drive in accordance with DIN ISO 1173-C 6.3Drive: 6.3 mm (1/4″) hexagon suitabl