Wera Bit-Check 12 Wood 2 General Purpose bit set for drill/drivers with stainless holder is designed for compact & organized tool storage.EXTRA-TOUGH (Z) bits are designed for driving screws into normal Construction Timbers & materials. With slim Stainless Universal bit holder with ring retention for insert & power bits. Wera Bit-Checks feature a compact design to safely store bits in a case that provides fast & easy tool selection. So slim it can fit into your pocket. Sorted by drive & size, tools are easy to locate & return to proper position, making missing products easy to identify.