ITEM NAME:5pcs Chainsaw Oil Drive Pump Worm Gear Chainsaw Spare Part 4500/5200/5800 FT Features 100% brand new. Type: Chainsaw Worm Fit Model: 4500 5200 5800 Chainsaw Material: PA Usage: Agriculture & Garden & Industry Package List:.5pcs Chainsaw Oil Drive Pump Worm Gear. Type: Chainsaw Worm. Fit Model: 4500 5200 5800 Chainsaw. Material: PA.