Joker Machine Billet 1 Throttle Tube For Harley Features: Fully CNC-machined billet construction with precision diamond knurl pattern to ensure no-slip grip performance Special hard black anodized finish for exceptional smooth action and improved durability over plastic units Works super smooth due to the precise bore finish and especially well with a light coating of lithium grease Allows installation of virtually any rubber-style hand grip in minutes Simply remove the two screws from the OEM throttle housing, slide the old grip off, then slide the tube into the throttle housing