About This American-Made Durability – Crafted in the USA from rust-resistant, zinc-coated steel for long-lasting performance in harsh outdoor conditions Stabilizes Your RV or Trailer – Reduces tire shift and sway by applying opposing force between tandem tires for better balance and control Compact Yet Powerful Fit – Adjusts from 1-3/8" to 10" to fit even the narrowest gaps between wheels on travel trailers, fifth wheels, and RVs Ready-to-Use Kit – Includes two X-Chocks and a 3/4" ratchet wrench with comfort bumper for quick setup and easy operation Secure and Worry-Free – Lockable design supports the optional 28015 Pad Lock and comes with a limited lifetime warranty for added protection Overview Brand : BAL Voltage : 100 Volts Recommended Uses For Product : securing trailers, RVs, or other vehicles with dual wheels during transportation or storage Power Source : Manual Special Feature : Portable, Lightweight