This ebay 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. The above avatar photo showing the layout of the: anvil, hammer pins and hammer cam is provided as a visual source of information. Any assumption that these parts are included with the tune up kit is your misunderstanding of my intent to provide assistance here. The auction photo of this offering is limited to the items shown in the primary avatar auction photo only. Hammer pins for the IM31 tool in these ebay store listings: ebay #123728371981. ebay #133017011850. ebay #123728381053. ebay #123728385988. The shipping weight is 4 ounces with an eBay USPS.com Ground Advantage shipping label. Ground Advantage is the slowest and cheapest shipping service offered on eBay. International orders are shipped to Glendale Heights, Illinois where the eBay Global Shipping Program completes the delivery process.