Pedro's combines 3. 2, 3. 3, and 3. 5mm spoke wrenches, a flat-head screwdriver, and 5mm hex wrench into the Six-Pack Chain Tool -- so you can cut redundancy, and weight, out of a tool roll or hydration pack. The Six-Pack is made from heat-treated, tool-grade steel and tips the scales at 80 grams. The chain function is compatible with 8-, 9-, 10-, and 11-speed chains, and its super-compact, ergonomic design fits just about anywhere, while still functioning like a full size chain tool. The Six-Pack Chain Tool is backed by Pedro's lifetime warranty.