Easy crank removal - Remove stubborn crank arms with a wrench to loosen the bolts, then thread the black lower portion of the tool securely in place. A simple coin is enough to help the crank move smoothly during the process. Compatibility - Designed for square taper, cranks, and sprockets. Suitable for a wide range of bicycles, including road bikes and mountain bikes. Reliability - Made from carbon steel for a robust, durable tool that delivers lasting performance. Compact and practical - Dimensions: 2.6 cm x 2.4 cm; weight approximately 120 g. Compact and lightweight for easy transport and storage. Use scenarios - Road bike maintenance: quickly remove and service crank arms during routine bottom bracket or chainring work at home or in a shop. - Mountain bike upgrades: convenient for swapping cranksets or inspecting crank interactions on rugged setups. - On-the-go repairs: portable in a bike bag or kit for field adjustments during rides or travel.