VERSATILITY – The Jack-It mounts over the tongue jack and attaches directly to you A-Frame trailer.Fit Type: Universal Fit. MORE SPACE – Frees up space for additional cargo on the rear of the trailer where bikes are typically stored. ENHANCED STABILITY – The Jack-It allows you to carry your bikes on the front of your trailer, where there is the least bounce. PROTECTS BIKES – Foam bumpers and the new SwayControl system enhance the racks natural stability and protects the bicycle finish. SECURITY – NoMotion pins minimize wobble and can be padlocked for security.