This Pricetronic Buy-It-Now offering provides all the above shown parts to tune up and field repair your Snap on IM31 and IM31A 3/8" drive impact wrenches. It is unique and custom designed by me. I also stock IM31 and IM31A obsolete parts and make expert repairs on this tool. Email me if you need further help beyond the scope of this tune up kit. The IM31A does not use the same hammer pins as the IM31 tool uses. Hammer pins for the IM31 tool in these Pricetronic store listings: Pricetronic #123728371981. Pricetronic #133017011850. Pricetronic #123728381053. Pricetronic #123728385988. This one kit B-I-N price is offered with shipping included to all 50 states and Puerto Rico. The shipping weight is 4 ounces USPS first class mail with an Pricetronic label and tracking. International buyers have this item shipped to Kentucky for additional processing costs through the Pricetronic global shipping program.