Precision Valve Grinding: This 2-piece Valve Grinding Set is ideal for hand-grinding flat head, unslotted valves, ensuring a perfect seal and optimal engine performance. Durable Rubber Cups: Equipped with synthetic rubber vacuum cups that resist oil, grease, and petrol, providing long-lasting reliability. Versatile Cup Sizes: Includes 1-1/8” and 1-3/8” diameter cups for larger valves, along with 5/8” and 13/16” diameter cups for smaller valves, making it suitable for a wide range of applications. Ergonomic Design: Easy-to-hold handles allow for efficient, precise grinding by hand, ensuring accuracy without fatigue. An essential tool for automotive maintenance, this valve grinding set offers dependable performance for professional mechanics and DIY enthusiasts alike.