The wera bit check 12 metal is a general purpose bit set for drilldrivers with stainless holder is designed for compact and organised tool storage extra tough z bits are suited to hard metal jointing threaded fasteners and general use with a slim stainless universal bit holder with ring retention for insert and power bits wera bit checks feature a compact design to safely store bits in a case that provides fast and easy tool selection so slim it can fit into your pocket sorted by drive and size