Hi folks, TinMan here..This sale is for a set (Left and Right) Lionel O27 manual switches. These switches most all are labeled as Lionel switches but were actually manufactured by a company called K line. Lionel bought out K Line and marketed these under there name. These guys are really nice and lock into place very well. I am impressed with how sturdy and well built they are. They have very visible colored flags, red and green, which indicate which way the switch is currently in. Red is for curve or switch exit, Green is for straight thru. They are a very low clearance so even the big boys engines and cars, have no problem running thru them. Anyway they are a great low cost item for your layout.