Sleeve metal hardened coated suitable for for bits according to din 3126 iso 1173 style c 63 and e 63 drive din 3126 iso 1173 style e 63 packaging plastic box reusable and dust repellent application whenever the bit needs a secure and zero play hold ideal for screw profiles eg torx which tend to jam in the screw extra with strong neodym magnet bit is automatically locked when inserted selflock simple bit removal thanks to easyout ejection function robust operating s