Item Type: Clutch Spring Compressor Material: Carbon steel Range: Approx. 125-155mm/4.92-6.1in Fitment: Universal for motorcycles and scooters, for 50 to 250 cc engines with 125-155 mm pulley. Package List 1 x Clutch Spring Compressor 1Applicable Model: This clutch spring compressor is universal for motorcycles and scooters, suitable for 50 to 250cc engines with 125155mm pulley. 2Main Function: Designed to assemble or disassemble a backpressure spring. With this collet, the backpressure spring will not jump in an uncontrolled way. 3Easy Use: Just place the converter unit, including the clutch, between the assembly tools, the assembly tool screws can now be tightened, and once firmly in place, all you have to do is loosen the nut on the coupling. 4Durable Material: The clutch spring compression tool is constructed of durable carbon steel with an antirust coating on the machined surface to ensure long term performance. 5Rigorous Testing: Manufactured according to strict production specifications, it is recommended to use it with clutch nut wrench to safely disassemble and assemble the scooter clutch center spring