Compact chain breaker for easy repairs Lightweight, compact design makes it simple to carry and store so you can do chain repairs anywhere — ideal for mountain bike chain fixes and on-the-go maintenance. Precise pin and body alignment lets you push out chain pins cleanly to break and rejoin chains without damaging links. Solid-grip wrench for secure tightening Supplied wrench gives a firm, secure grip for tightening and loosening related fasteners during repairs. Provides better control and reduces slippage when working on chain links or other drivetrain parts. Crankshaft/cassette wrench for stable removal Integrated crankshaft key with accompanying wrench provides a secure attachment point and stable setup when removing cassettes or performing hub/drivetrain work. Designed to hold components securely during removal and installation. User-friendly crank puller for effortless crank removal Crank puller is engineered for straightforward, low-effort removal of the crank/chainring assembly, making routine maintenance or part replacement simple for home mechanics and pros alike. Clear operation reduces the risk of cross-threading and speeds up maintenance tasks. Applications / use scenarios Trail repair: Quickly remove and rejoin a damaged chain on a mountain-bike trail to get back riding without a lengthy wait. Home workshop: Remove cranks and cassettes for routine servicing, cleaning, or replacing worn components. Mobile or event mechanics: Compact kit fits in a saddlebag or toolbox for service at races, group rides, or roadside callouts. Key attributes and benefits Function: chain breaking, crank removal, and cassette/crankshaft fastening and removal. Portability: compact and lightweight for travel and storage. Performance: solid grip and stable fastening for safer, more reliable repairs. Practical for MTB repairs, general bicycle maintenance, and mobile mechanic use.