Damyprd 14mm Piston Stop Tool Engineered for professional mechanics and DIY enthusiasts, this heavy-duty piston stopper delivers unparalleled precision in 2-cycle engine maintenance. The patented dual-lock mechanism securely anchors piston positions during spark plug replacement or carburetor adjustments, eliminating accidental engine rotation. Key Specifications: Material: Grade 8 Steel with Anti-Corrosion Coating Torque Capacity: 150N·m Compatibility: Husqv arna/St ihl/Echo 14mm engines (models 2015+) Package: 1x Main Tool + 3x Adapter Rings + Storage Case