The Box Two shifter offers exceptional performance with high-quality componentry. It features a hinged clamp made of extruded resin and steel, with a durable die cast aluminum top shell. Not only is the shifter mechanism joyfully simplified, but fewer shifts are needed for every mile of travel. Prime 9 is also terribly forgiving so you won't have to constantly adjust your set-up.Multi-shift lever allows you to pull several gears at once (up to 3 per shift)Prime 9 technology offers the same range as a 12-speed drivetrain, with fewer gears to shift throughDie cast top shellHinged and extruded clampFast action leverItem SpecificationsColorMatte OnyxDrivetrain Speeds9Rear Der/Shifter CompatibilityBOX Prime 9Shifter StyleThumbWeight135 BOX Two Prime 9 Shifter Shifter, Flat Bar-Right UPC: 639266097266