Valve locks (keepers) are crucial to assist in securing valve train control. The combination of high quality valve locks and spring retainers are the key to holding the valve spring under the correct pressure and in the correct position. CHE offers the highest quality machined valve locks on the market in heat-treated steel and titanium with standard and offset heights for various applications. Need your valve locks coated? We offer black-oxide and zinc coatings to suit your specifications.