*TBV-34- Made especially for the smaller trailers with emphasis on boating, snow mobiles and other uses. All Aluminum construction with stainless steel locks and latches for security. *TBV-49- Larger version of this series for big utility trailers designed to make the best use of available space. Anchors, rope, batteries, tools, etc. all find a good home in this box. It uses space usually not used and helps balance trailer for better towing by putting the load forward.