EASY TO STORAGEEach feeler gauge set has 32 blade thicknesses. Collapsible storage for easy portability and preventing damage to individual blades. The tool includes a blade pocket for easy blade removal. MultifunctionalStainless steel feeler gauge set for measuring the thickness of tappet clearance, piston ring clearance, spark plug clearance, bearing clearance and other hard-to-reach places. Easy and Convenient to UseThe thickness gauge is made of high quality stainless steel, each measuring feeler gauge has 32 blade thickness; it can be folded for easy carrying and storage. Easily measure gap width with an ABN valve offset feeler gauge. It's great for guitars, engines, and more. DURABLE TO DURABLEMetric spark plug gauges are made of quenched and tempered steel with a lubricant coating to prevent pitting and corrosion for durability. Each blade has laser-etched dimensions for easy identification; the blades are secured within a blade protector to prevent individual blade loss. Easy to IdentifyEach blade of steel feeler gauge is laser etched in metric and imperial, measuring gap: 0.0015"/0.04mm to 0.035"/0.88mm.