Steel Construction: Crafted from high strength 45 # steel with anti rust, ensuring impacts resistance and long term durability for heavy duty automotive and mechanical repairs 72 Tooth Precisions ratchets: Features a 72 tooth ratchets head with just 5° minimum rotation angles, providing tight engagement for easy operations in confined spaces like engine compartments and wheel hubs Pull Down torques Locking: Slide down mechanism with auto to torques value shifts during use, providing secure and operations Quick Releases Socket Compatibility: button socket release with reversible switches for fast mode changes, 1 / 4 ", 3 / 8 ", and 1 / 2 " drive size High Precisions torques Control: Industrial grade ±3% accuracy with markings for durability, offering bidirectional ratcheting to precisely control bolt torques and overtightening or leaks, Manufacturer: PXZH