Excellent Design: A pass-through hole on each side allows a socket to be used to remove or install the phaser bolt. Compared to the traditional methods by using an open end wrench to hold the cam for in-vehicle service, using this tool is easier and handier, avoiding the embarassments and inconvenience when repairing. Material: Made of high standard iron that coated with black oxide finish, resisting rust, corrosion and high temperature, ensures a Unparalleled long term service. Inastallation: Remove timing chain guide bolt plate tensioner/ Rotary intake camshaft actuator to install FTST-0004 locking tool Function: To maintain the timing chain put in the correct position and work stably, the tools are used to fix the camshafts on the ECOTEC engines when removing or installing the cam phaser bolts. Material:metal colour:gold Package Contents: 1 x Cam Phaser Retainer Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.