Ultimate Trail Companion The MTC-40 is a premium folding bike tool designed for quick adjustments and emergency repairs on the go. It includes hex and star driver wrenches, a universal screwdriver, and a chain breaker with an integrated disc rotor straightener and bottle opener. A detachable CO₂ inflator adapter works with most Presta valve tubes for fast tire reinflation. Built with a super-strong composite handle and hardened, plated tools, the MTC-40 is compact, durable, and always ready for the ride ahead. Includes 2.5, 3, 4, 5, 6 and 8 mm hex wrenches T25 & T30 Torx®-compatible drivers Combo cross/straight tip screwdriver 5- to 12-speed compatible chain tool* with integrated disc brake rotor straightener and bottle opener CO2 cartridge inflator adapter Key ring holder Dimensions: 80 x 52 x 22 mm (3.1" x 2" x 0.9") Weight: 217 grams (7.65 oz.) NOTE: The MT-40 chain tool will not peen Campagnolo 11-speed chain rivets (see the Park Tool CT-4.3 or CT-6.3). The pin of the chain tool is replaceable