RESURFACE & RESET: When the deposits in your valves build-up, it starts to prevent a gas tight seal between the valve and the seat, they may need to be reconditioned, and you can do this with a Holts Valve Grinding Stick.
Valve Lapping Tool Attachment Kit Valve Lapper for Drill Valve Grinding Engine
Valve Grinding Kit - EWE STOP RUST Grinding Compound plus Valve Lapping Tool
US PRO Tools Valve Lapping Tool Attachment for Drill/Driver with 5 Cups 5562
Valve Lapping Tool Kit for Resealing Cylinder Heads and Removing Deposits
Valve Grinding Stick Lapping Tool - Wooden (EWE STOP)
SET OF VALVE GRINDING LAPPING TOOL + TIN OF GRINDING PASTE + SPARE RUBBER HEADS