Popped this in my pocket to see what I'd think of it.
The Leatherman JAM tool is an add-on to their Style line of keychain-sized tools
The Style fits in there nice and snug, and the design still allows use of the Style carabiner through he Jam's 'biner
The Jam has 3 wrenches on it - 3/8, 1/2, and 9/16
As well as a holder. cord manager for ear buds and a file.
It was made for skateboarders, that is why those particular sized wrenches
With the style inside of it you have two choices - the PS and CS. Today Im using a CS in it, though I carry a PS to my job each day (the PS is TSA approved).
The CS and PS differ in two ways
Each has the carabiner/bottle opener, and each as the file/screwdriver tool on them.
Where they differ is the PS has pliers as the main tool and small set of scissors. The CS has scissors as the main tool with a small, one inch (approximately) blade.
The Style line comes/came in 5 different colors: Red, Black, Blue, Pink, and, hard to find, Olive Drab Green. Im still searching for a green in either model, dont have it yet.