Fast Valve Adjustment: Valve lash adjusting wrench design cuts adjustment time in half by allowing one hand to hold the rocker while the other sets lash, Dual-Function Design: Special wrench fits over the rocker arm lockdown while the T-handle drops through the access hole for precise control, Complete Tool Set: Includes two steel T-handle wrenches sized 3/16 inch and 1/8 inch for common rocker arm adjustment needs, Durable Steel Construction: Two-piece steel tool delivers strength, accuracy, and long service life in demanding racing or shop environments, Racing Tool Application: Ideal for quick and accurate rocker arm adjustments on performance and racing engines during maintenance or setup.