I bought this set of Allen/ Hex Key Wrenches by #SANDAO as they are well crafted. My son is forever in need of a HEX Key or Allen Wrench and he somehow never seems to have the correct size. This set of 8 various keys comes on a ring and has the 8 most popular sizes so it's bound to be the perfect set. At $6.99 for the complete set it truly is a bargain. Somehow we always seem to need a hex key to put furniture together, tighten the handlebars on a scooter or bike, tighten a screw on a furniture in a box item etc. This will allow you to do all of that and more. A great bargain that I recommend for every tool box.