Built to Last --- 16 in 1 multi tool is made by Chrome-Vanadium Steel, corrosion resistant and capable of withstanding high amount of turning force when in use. Riding Companion --- Equipped with Allen Key (mm): 2 | 2.5 | 3 | 4 | 5 | 6, Socket Hex Wrench (mm): 8 | 9 | 10 and a Socket Extension Rod, Flat Wrench (mm): 8 | 10 | 15, Spoke 14GE, Slot & Cross Screwdriver, WOTOW bike multi function tool kit always have your back in each trip. Compact & Easy to Carry --- Only at 3.5*1.8*1.1 inch (L*W*H) when folding, mini enough to throw into saddle bags or pocket, portable to carry anywhere and not add load to cyclists. Tire Levers --- 3 Nylon tire pry bars are included in the tool kit, easy for cyclists to remove the inner tube and provide assistance during repairing for a flat tire. Extra Allen Wrench --- A separate Allen wrench is designed to tighten the bolts if the tool get loose, or to loosen it when the hinge too tight in the first use.