hexagon type with holding magnet 6.3 mm (1/4") drill shaft Socket hexagon, 6.3 mm (1/4") drive: 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 mm profile: hexagon drive profile size, metric: 6.3 mm | drive profile size, inch: 1/4" length: 65 mm