Description: Fitment: The valve lapping tool can be used to clean up carbon deposits on the valves of automobiles, motorcycles, ATVs and small engines 4 Suction Cups: Drill valve grinding kit includes 4 attachable suction cups in sizes 20mm (3/4 inch), 30mm (1-3/16 inch), 35mm (1-3/8 inch) and 45mm (1-3/4 inch), oil and UV resistant, can fit and secure various valve sizes in lawn mowers, cars or motorcycles Easy to Use: The valve lapping attachment tool can be used with a small electric drill, different engine valve sizes can be used with different suction cups, the working speed is 1000rpm to 1250rpm, which is convenient and fast to use. Durable: The valve lapping tool is made of high class rubber, not easy to age and corrode,with a long service life and can be reused repeatedly. High Work Efficiency: The drill attachment provides a greater control and productivity, good performance. Specification: Color: As shown. Material: Rubber+Metal. Suction Cups: 20/30/35/45mm. Speed: 1000rpm to 1250rpm. Note: There might be a few color distortions due to different computer resolutions. There might be a slight error due to different hand measurements. Package Includes: 1 Piece Rubber Roller Attachment 1 Piece 3/4 inch Suction Cup Adapter. 1 Piece 1-3/16 inch Suction Cup Adapter. 1 Piece 1-3/8 inch Suction Cup Adapter. 1 Piece 1-3/4 inch Suction Cup Adapter.