Features 1、[High Quality Material] The metal combiner is made of high quality aluminum alloy material, which is environmentally friendly and durable. 2、[Replacement] These high quality aluminum alloy 12mm hex wheel hubs adapters are accurately sized and easy to install and replace. 3、[Durable] The RC hex hub extension drive adapter is durable enough for long term use, improving the overall performance of your model car. 4、[Stable Ride] The 12x16mm wheel hex hubs drive adapter increases the tire distance of the car, strengthens the grip, and makes the car ride more stable. 5、[Easy to Install] This remote control car 12mm metal hexagonal coupler set is equipped with a wrench for easier installation. Item Type: 12mm Hex Wheel Hubs Adaptersr Set Material: Aluminum Alloy Adapter Diameter: Approx. 12mm/0.47in Combiner Height: Approx. 16mm/0.63in Applicable: 1/10 Remote Control Car Universal (Such As 1/10 for Arrma Senton, for Granite, for Big Rock, for Typhon, Etc.) Package List 4 x Combiner 4 x Mounting Post 4 x Pin 4 x Set Screw 1 x Wrench