Friction gear 'controls' from Shimano's first mtb specific Deore XT 'Deers Head' group, OEM installed on early Specialized, Ritchey, Fat Chance, and some of the first run of Cannondale, Trek, Mountain Goat, Breezer III(3), if you have used or seen many bullmoose bar early-mid 80's mountain bikes, you know what a 'staple' they were on many rides. The larger size than the Suntour power shifters was appreciated by some wearing thick gloves in cold weather, and the ease of removing/installing the two-piece bracket was another plus, easy cap removal for installing cables, and force adjust rings. 5-7 speed to shift most rear 'mech's', but with some savvy spacing setup can shift 8, friction only, also great for those 1-2 speed commuters, as they hold their dialed in gear solid.These were removed many years ago and securely packed away, some normal use scratching and nicks,, rubber covers have a couple small thumbnail nicks. Ready to install on your restoration/custom build, or if you just enjoy riding, and don't do a lot of shifting and want to replace those under bar or twisty shifters on your ride with some easy to use, long lasting component.