ITEM NAME:4pcs Piston Pin Bearing Needle Cage Clutch fit for Stihl 066 MS660 064 9512 003 4 PCS Piston Pin Needle Cage Clutch Bearing Fit for Stihl 066 Ms660 064 Chainsaw SPECIFICATIONS.(4 PCS Piston Pin Needle Cage Clutch Bearing Fit for Stihl 066 Ms660 064 Chainsaw. Compatible With: fit for Stihl 066 Ms660 064 Chainsaw. Item included: 4 x Clutch Needle Bearing. 2) Perfect match for the original one.