Compatible with 1/10 RC Crawler Car TRX4 Axial SCX10 Upgrade | Size f2x10 mm ;Length: 10 mm;Outer Dia.: 2 mm | Made of steel material,with smooth surface, heavy duty and durable, great replacement part for your rc scale model | 1 Universal 2x10mm pins, please check the size before purchasing. | Package includes 50pcs 2*10mm hinge pins