Features: [Precise Chain Grinding Experience] The Hands-operated design delivers stable chain grinding, ideal for outdoor cycling enthusiasts to maintain chains in wild conditions. 【Portable and Lightweight Structure】 Mades of lightweight aluminum alloy, it is easy to carry and suitable for taking along during long-distance travel or daily commuting. 【No Power Supply Limitation】 Chain grinding can be completed by manual work, perfectly fit for outdoor activities such as camping and hiking. [Efficient Grinding Capacity] Equipped with a high-hardness grinding head to achieve fast and efficient removal of chain rust and dirt, extend the service life of the chain, and keep the chain running smoothly. 【Safety Anti-Slip Grip】 Provides a comfortable grip, including for beginners and professional maintenance personnel, for safe use. Specifications: High-strength plastic & stainless steel buildAdvanced molding craftParameters: Fits various chain sizesSize: Check size chartSelling : Portable design, easy to carry, ideal for outdoor scenariosPracticality: Manual use is simple and convenient, suitable for gardening enthusiasts, forestry workers and home users to conduct chain maintenance and grinding Package Includes: Hands cranked chain grinder main unit×1 note: Please allow 0-3mm errors due to manual measurement, make sure that you do not mind before you order.