3-piece spark plug socket kit with 16 mm and 21 mm sockets and a T-handle - Ergonomic T-shaped handle wrapped in rubber for a comfortable, non-slip grip during extended use - Flexible 360-degree rotating head allows quick and easy spark plug removal and installation, even in tight or hard-to-reach spaces - Lightweight and foldable design for easy transport and storage in a garage or car trunk - Maintenance note: spark plugs can leak oil after long use. Inspect and clean periodically, and replace the spark plug if the seal is insufficient - Constructed from high-quality 45# steel, hardened for durability. Rust, heat, and corrosion resistant. Compact, portable and built to last - Includes 16 mm and 21 mm sockets suitable for common spark plug sizes Use scenarios: - Replacing spark plugs in cramped car engine bays - Servicing spark plugs on motorcycles, ATVs, or lawn equipment with limited space - Keeping in your trunk or toolbox for quick field maintenance