Provides extra power site for new GM double stacked cables. Also ideal for RVs with dual batteries running in parallel. Specifications include: Overall Length: 1.832, in. Nominal Diameter: 5/8 in. hex, Coupler Thread: 3/8-16, Battery Insert: .250 in. long, Stud Thread: 3/8-16 and Stud Length: .960 in..