This is an indoor bicycle training stand that fits a 26" or 27" bike with quick change axles. You make a one-time change to the included axle so the orange frame can hold your bike by the domed ends of the included axle.
It takes 5 minutes to change axles and you only do that once. You ride your bike on the street using the included axle and it makes no difference in the way your bike rides. The instructions are included. Then putting your bike into the stand or removing it only takes a minute whenever you want to ride indoors.
This is a very heavy duty well-made stand. It has seen very little use - like most exercise equipment.