Item Type: 5mm to 5mm U Joint Material: Steel Color: Silver Weight: Approx. 92g / 3.2oz Product Size: Length: Approx. 51.5mm / 2.0in Diameter: Approx. 12mm / 0.5in Connecting Hole Diameter: Approx. 5mm/0.2in to 5mm/0.2in Side Hole Diameter: Approx. 3mm / 0.1in Applicable Model: RC Model Car, Model Boat, etc. 1Steel Material: 5mm to 5mm U joint is made of steel. Heating and electroplating process make it firm and insulating, and the impact shaft is more stable. 2Applicable Scenes: Three joint universal joint is used to connect two shafts and can be bent at any angle. It can be used in various model cars and model boats. 3Good Advantages: The three joint universal joint is more flexible than the two joint universal joint, and the transmission angle is larger. 4Replacement Part: 5mm to 5mm universal joint is easy to install and disassemble, you can directly replace the old or damaged parts. 5Good Workmanship: Exquisite workmanship, beautiful appearance design, small portable size, providing you great using experience. 3 x Universal Joint&nbsp 12 x Set Screw&nbsp 1 x Wrench