Used to connect self-locking mountain bike pedal and self-locking castle shoes, suitable for most cycling shoes, compatible with Shimano SPD series and more. Universal design. Self-locking pedals compatible with Shimano SPD -M520 M540 M8000 M8020 etc. pedal system, and Wellgo M094 823 WM001 M19 W01 C099 M17C etc. It is suitable for almost all SPD mountain pedal systems. Pedal plates and screws are made of high quality steel, durable and sturdy. They have certain strength and thickness which are not easy to break. Extremely durable. Easy to install and use, install with a metal plate which can prevent screws from slipping and make driving safer. Contains: 2 padlocks, 4 screws lock washer, 2 flat washers, 2 stainless steel flat washers and 1 hex wrench. Product Description Features: This product is used to connect the self-locking pedal and self-locking shoes of the mountain bike. Lightweight, thick and durable, suitable for a variety of mountain SPD locks. Specification: Condition: 100% Brand New Material: Steel and Stainless Steel Color: Black Size approx.: Padlock: 36 * 32 cm Locking screw: 12 * 4.7 mm Black washer: 25 * 12 mm Steel washers stainless: 35*30mm Hex key: 58*4mm Packing list: 1 * pair of padlocks 1 * pair of black washers 1 * pair of stainless steel washers 4* locking screws Due to manual measurement, the size of the product may vary slightly. Thank you for your understanding!