Ordering by number: this is 3310100585, the Atlas Copco retainer – complete. This part keeps the steel captive in the tool under repeated impact, so it is inspected at every steel change and replaced on condition rather than on a schedule.

Matching it to a machine? Send us the model and serial and we will confirm the fit, or work back from the full diagram library. Complete tools are on the Atlas Copco catalog. Ships from our Denver warehouse; in-stock parts ordered by 4 PM ET go out the same day.

• Part number: 3310100585
• Manufacturer: Atlas Copco
• Crowder SKU: AC-3310100585