Pocket-sized, Wera Bit-Check General Purpose Set for drill/drivers is designed for compact and organised tool storage. Extra-Tough (Z) bits are suited to hard metal jointing, threaded fasteners and general use. 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, tools are easy to locate and return to proper position, making missing products easy to identify. Chrome Molybdenum Steel Blades Suitable for Power Screwdrivers & Hand Tool Bit Holders Hex-Plus Reduces Screw Profile & Allows up to 20% More Torque Chrome Molybdenum Steel Blades Suitable for Power Screwdrivers & Hand Tool Bit Holders Hex-Plus Reduces Screw Profile & Allows up to 20% More Torque