Here's a great example. This is a New Old Stock Gen-2 rear Disc Pad Pin Kit from EBC. I've never seen one of these but what a bargain! This kit contains a collection of hardware you may want or need for your caliper rebuild, not commonly found in a caliper seal kit, for example.
From left to right in the photo, we have the no-longer-available "hanger" and its attaching bolt which secures the pad pins, followed by the two pad pins, and finally the pad spring. The pins and spring are still available from Honda, but if you were able to purchase all of this separately it would total about $70.
Our seller has this kit listed for only $10 including shipping! And, within one hour of my adding the listing to my eBay Watchlist, I was sent an offer for $9.50 — that's a little discount trick I've often used over the years to save a little on the many parts I've had to buy.
I don't have a need for these parts, but if you're doing a complete caliper rebuild, maybe you do. The remaining parts required would typically be piston seals (K&S 19-1005) and the lower slider "sleeve," Honda part # 45111-MA3-006.