Complete valve grinding kit includes a pair of double-ended valve lappers and a tin of fine/coarse lapping paste. The lapping sticks have rubber end cups shaped to stick to the valve for accurate manual lapping of the valve head. The coarse 80 grit paste has a fast cutting action to clean through rust and deposits quickly whilst the fine 220 grit paste leaves a refined finish. A simple and effective way to remove surface defects, corrosion and deposits from the valve head to ensure a perfect seal.