Integro Mining Cord Sets come with a special feature designed for safety. Most battery caps are manufactured with some type of sheet metal, which is very sharp. This causes a potential hazard since a nick in the cable jacket can cause a disaster. Every Integro Mining Cord Set comes with a special Strain Relief Grommet, located near the battery end of the assembly, that is permanently molded to the cable jacket. The Grommet snaps into the battery top and will hold in place at 40 lbs of pull. This protects the cable from damage and takes all of the pressure off of the battery connections. Many have tried other methods of assuring the safety of this connection, but none can offer the reliability and safety of Integro!