The Chainsaw Oil Pump Worm Gear Kit of 10 Pieces for 58 CC Petrol Chainsaw is designed to facilitate efficient oil circulation in chainsaws, ensuring that the chain is well-lubricated during operation. This kit is typically used for maintaining and repairing the oil pump system in petrol chainsaws, particularly those with a 58cc engine. The worm gear kit helps in the smooth distribution of oil to the chain, reducing wear and tear and improving overall performance.