Item Type: 420 Motorcycle Chain+Chain Breaker Material: High carbon steel Chain Size: Pitch: 1/2in Roller Width: 1/4in Roller Diameter: 5/16in Sprocket Thickness: 0.227in Standard: 1pcs roller chain and 1pcs chain breaker(chain breaker is suitable for 420-530) Fitment: Links can be removed to fit virtually any application by chain breaker, like 50cc 70cc 90cc 110cc 125cc ATVs and dirt bikes, Go Kart, Mini Bike, Scooter, Pit Bike, Quad. Package List 1 x 420 Motorcycle Chain 1 x Chain Breaker 1Fitment: 420 motorcycle chain fits for 50cc 70cc 90cc 110cc 125cc ATVs and dirt bikes, go kart, mini bike, scooter, pit bike, quad. 2High Quality Material: Motorcycle chain is made of high carbon steel, acid, alkali, cold and heat resistance, have a long service time. 3Excellent Performance: Rustproof, strong oxidation resistance. Lubricating oil with strong abrasion resistance, durable tensile strength and high adhesion. 4Easy Operation: The chain breaker has a ergonomics design and will make your work much easy, convenient for using, save your efforts. 5Original Standard: Professional manufacturing according to original standard, stable performance and high reliability.