BILITOOLS 2PCS Valve Lapping Tool Kit, Grinding Tool, 8 Spare Cups 4 Sizes: 0.6", 0.8", 1.1" & 1.4", 2 Solid Wood Handles, Synthetic Rubber for Automotive, Motorcycle Small Engines

【MANUAL VALVE LAPPING TOOL】 Designed for hand lapping engine valves and valve seats during cylinder head service and engine rebuilds. Apply lapping compound to the seating surface, attach the proper suction cup to a clean valve face, and roll the handle back and forth between your palms. Lapping compound not included. 【4 CUP SIZES & 8 REPLACEMENTS】 Two double-ended valve lapping tools cover four suction cup sizes: 15mm, 20mm, 28mm & 36mm. Includes 8 replacement suction cups, 2 of each size, for different valve head diameters and convenient spares for future use. 【SOLID WOOD ERGONOMIC HANDLES】 Includes 218mm and 203mm solid wood handles with a contoured, non-slip ergonomic shape for comfortable hand control while rolling the tool. 【AUTOMOTIVE & SMALL ENGINE USE】 Suitable for valve lapping on automotive engines, motorcycles, lawn mowers, small engines, and similar engine rebuild or maintenance applications. Choose a suction cup that fits securely within the valve face before lapping. 【CLEAN SURFACES FOR BETTER SUCTION】 Clean the valve face and suction cup before use and keep lapping compound away from the suction surface. Press the correctly sized cup firmly onto the valve before rolling the handle; proper cup selection and surface preparation help reduce slipping during hand lapping.