The DW-01 EDC Tool Hex Wrench from Sunwayfoto is a handy triangular tool with a flat screwdriver on one corner, a 4mm hex wrench on another corner, and a 2.5mm hex wrench on the remaining corner, compatible with the most common photo equipment accessory screws. The flat head screwdriver can also be used as a box opener or can pull-tab opener. The MT-01 features both a metric and imperial ruler, and has a strap hook with a raised lip to prevent it from accidentally slipping off.