The nickname "Jimmy" was derived because the majority of the total production was done by the GMC firm

was conceived and designed in 1938 by Dr

Compliant w/: IFMAR

Includes new steel ball ends with oversized threads for extra endurance over the stock balls

Trailrunner body thermoformed in high-strength polycarbonate

Hot Racing - Aluminum Battery Hold-Down W/ Heat Sink, fits Traxxas X-Maxx ASC40010C The nickname "Jimmy" was derivedHot Racing aluminum battery hold down with integrated heatsink for the Traxxas X Maxx 6S and 8S YOU WILL RECEIVE: One (1) left battery hold down One (1) right battery hold down REQUIREMENTS: Installation COMMENTS: Replaces Traxxas plastic 7719 battery hold downFeatures: CNC machined billet aluminum, anodized black Machined cooling fins help dissipate battery heat Direct fit hop up requires no model modification for use Specifications: Length: 10. 1"