Wide Compatibility: These 1/10 RC Crawler Drive Shafts are designed to fit popular models such as Traxxas TRX4, Axial SCX10, and TRX4 90046, ensuring a seamless upgrade for your RC crawler.Precise Dimensions: Offered in two lengths—94-125mm (3.70-4.92in) and 117-168mm (4.60-6.61in)—with a hole inner diameter of 5mm (0.19in) and a maximum outer diameter of 12.5mm (0.49in). These specifications ensure a perfect fit and optimal performance.High-Quality Construction: Crafted from robust metal alloy, these drive shafts offer superior strength and durability. They effectively minimize rotation noise, reduce play, and increase transmission angles, leading to enhanced overall driving performance.Complete Kit: The kit includes 1 metal alloy drive shaft (94-125mm), 1 metal alloy drive shaft (117-168mm), 1 storage box, and 4 M4 drive shaft pins, providing everything you need for a hassle-free upgrade.Easy Installation: Designed for direct replacement, these drive shafts require no modifications or special tools. Simply replace your old shafts with these new ones to enjoy an upgraded driving experience.