I use these on my personal Steadicam socket blocks because the small diameter brass tips protect the threads from getting smashed over time with use. These are 1" long.
Sold in sets of two.
Thomas' Tips: These are fairly easy to make for yourself out of readily available hardware. I used to make these for my own Steadicam even before I had a machine shop. I usually keep a couple sets in stock to save you the hassle of pressing your own, but I'm also happy to provide instruction if you would like to try it yourself. Email me for a couple methods you can use to press these with tools you may already have in your garage.