It's supposed to be the strongest production padlock that money can buy.
The SS100 is named not for the classic Jaguar but for its 100-millimeter (about four-inch) diameter, which is massive for a padlock. The largest padlock Squire currently offers is 80 millimeters (just over three inches). The SS100 is bulky and beefy, weighing in at a hefty 4.3 kilograms or nine and a half pounds. You could incorporate this lock into your daily workouts by hefting it around.
The advantage of a padlock this huge in an age where smaller seems to be better is how difficult it is for would-be thieves to bust it. The SS100 has a closed shackle design with a boron steel shackle that's extremely difficult to cut. Size matters in locks because the more metal there is to cut, the longer a theft attempt will take. Squire is counting on portable metal cutters and angle grinders running out of battery before they can get through this lock. Also, the longer a lock takes to defeat, the better chance there is that the thief will get noticed and someone will call the rozzers on them.
The SS100 also comes with a 1.5 meter (about five foot) chain with hardened alloy links nearly an inch big as a further deterrent. It seems easier to cut the chain than the lock, but thick hardened steel still isn't exactly easy. Who knows how many cutting disks a thief will go through trying.
With its size and bulk, the SS100 and its chain will be difficult to carry with you, especially if you don't have a cavernous storage capacity as I do. But for a solution at a home or office where you park regularly, the SS100 looks like a great solution.