Stainless steel: Made of strong stainless steel, well polished surface. Easy to install: Remove your stocked axle, and put this hitch up on and re-install it tight, you can done this in 1 minute. Easy switch from bike to bike: With spare hitch you and your families can use different bicycles to tow the trailer without waste a lot of time on removing and installing the hitch cup. Thru axle bike compatible: The axle hole on the hitch is 12.1mm, a 12mm thru axle can go through it, but we suggest you use a thru axle hitch adapter to prevent scratching the bike painting. This is a high quality hitch which can almost as good as the stocked one on your bike trailer. We take pictures with the real product, without much ps processing, what you see in the picture, what you will get.