Quik Grip--the highway service chain for light trucks. Chain tightners are not required with the since tightening is done with the provided cam tool. Each set includes this cam tool and step by step instructions for easy installation.  This is a durable link chain that provides optimal traction for your light truck and is a good alternative to cable chains when clearance is not a issue.  Does not meet S.A.E class "S" clearance.