Check the listing for details. Milwaukee 36-66-1675 Int Gear and Pinion Assembly. Condition: New. Listed at 38.98 USD. **Milwaukee parts change not only by model# but also by serial number. look up your tools parts break down on Milwaukees websiteMilwaukee Int Gear and Pinion AssemblyModel Number: 36-66-1675Milwaukee tool replacement parts. Check the link above to make sure these work with your model number and serial number.Works With:1675-1 (SER 413-336097) Two Speed Hole Hawg Drill1679-01 (SER 915A) Electric Drill / Driver1679-01 (SER 915A) Electric Drill / Driver1675-1 (SER 413C) Two Speed Hole Hawg Drill1675-1 (SER 413B) Two Speed Hole Hawg Drill1675-1 (SER 413-14429) Two Speed Hole Hawg Drill**Since we offer free Shipping. All free shipping items will go out the lowest cost shipping method of our choice. We use a variety of methods from USPS, UPS and FedEx. **eBay Return Policy. You must return an item in the same condition as it was received, not used or altered in any way. **Guaranteed delivery dates are put on ads by eBay and not us. This guaranteed date is based on average shipping times and isn't promised by us. We try our best to ship all orders the same business day during our normal hours. We are not open on the weekends. If item(s) don't arrive by the guarantee date you can contact eBay and they will make it up to you.