High Hardness and Rust Prevention - The tool hooks are made of high-carbon steel, with an overall heat treatment process for high hardness and a bright burnt surface for strong rust prevention. Wide Application for Various Types of Seals - These 4 oil seal hooks can be used for bicycle seals, front fork oil seals, lathe base springs, etc., with a wide range of applications. Comfortable Engineering Handle for Extended Use - Features a non-slip engineering handle with a comfortable grip that is not easy to fatigue, for extended use. Versatile Tool for Use in Various Machines and Devices - With packaging specifications including 4 different seal removal hooks, scrapers, and a special tool bag, the seal removal tool is perfect for assembling, repairing, or disassembling small parts in various machines and devices. Ergonomic Design for Easy and Comfortable - The non-slip, easy-grip TPR handle allows for added control and reduces effort during use.