Storage Box: Comes with a durable, dust-proof storage case to keep everything organized and ready for action. No more messy tool boxes—just grab and go! Sturdy Steel Construction: Made of high-strength steel that can handle up to 1.2 tons! Rust-resistant coating and heat-treated screw ensure it works like a charm under pressure. 4 Security Pins: Four security pins lock the spring in place for extra secure compression. Just tighten slowly and apply even pressure on both sides for secure operation. Secure Compression: The hexagonal end fits 0.86 in / 22 mm sockets or manual wrenches. Avoid using impact wrenches when compressing the spring for security! Applicability: With a 10.4-inch max compression stroke, this spring compressor tool fits most medium and small cars with MacPherson struts and springs—making suspension maintenance super easy!