Features: Tool Set for Detroit Diesel 60 Series Engine 1. Cam gear holding tool used to correctly keep the cam device fixed without damage while removing/installing the cam device fixing bolt, alternatives to j-35652-a, fit for detroit diesel 60 series 2. 12MM 12PT 1/2 inch drive extra deep socket used to torque the rocker arm nut to oe specification and has a stepped outside diameter for proper clearance and access to the fastener, fit for detroit diesel 60 series 3. 4.6mm 4.1mm jake brake feeler gauge for checking the valve clearance, allow easier insertion between slave pistons contact surface with the exhaust valve adjusting screw. fit for dd15 & dd16 engines .