This powered valve guide driver is designed so you can standardize the correct installed height on one guide and repeat it on the others. Pilots are replaceable and simply screw in to the desired depth. This kit includes the Pneumatic Tool Body (AVG-1), Installation Sleeve (AVG-3), Locking Nut (AVG-2) and four replaceable Pilots (AVG-312, AVG-343, AVG-372 and AVG-437). Other pilots also available.