The Draper 12 Piece Diesel Compression Test Tool Kit is a comprehensive testing solution designed for diagnosing diesel engine performance through accurate compression measurement. This professional-grade kit is compatible with both direct and indirect fuel injection systems, making it a versatile choice for workshops and mobile mechanics working across a wide range of diesel vehicles. The kit centres around a 63mm diameter dual-reading pressure gauge offering measurements in both psi (0-1000) and bar (0-70), providing flexibility for different diagnostic requirements. The gauge is protected by a heavy-duty rubber sleeve to withstand workshop environments, whilst the integrated Schrader one-way valve system ensures accurate pressure retention during testing. A spring-loaded pressure relief valve allows for safe and controlled depressurisation between tests. Durability has been considered throughout the design, with anti-kink coils fitted to both ends of the 380mm flexible hose to preve