Rust protection finish Anti-rust blackening technology protects the tool in damp environments and helps extend its service life, while also maintaining a clean, professional appearance. Effortless locking handle Flower-shaped locking handle enables secure, effortless locking of the valve spring. This design reduces hand fatigue during maintenance and supports efficient, comfortable operation. Reinforced puller feet Thickened puller feet are one-piece molded and undergo a high-temperature heat process for added strength and durability. This construction improves performance when removing or installing valve springs and provides long-lasting reliability. Versatile use Designed to ensure smooth valve spring compression on any vehicle model. A reliable, essential tool for a mechanic’s toolbox with broad compatibility and dependable performance. Use scenarios - Replacing valve springs during a cylinder head overhaul on a typical passenger car engine (for example inline-4 or V6) where controlled compression is required and space is limited. - Removing or installing valve springs on a heavy-duty engine in a repair shop (truck or SUV), where the strengthened puller feet and durable construction are advantageous. - General multi-vehicle maintenance in DIY or professional garages, enabling smooth valve spring compression on any vehicle model.