Doomsday Discs says:
The Proximity Mine is another approach putter in the “Land Mine” family. It’s a large, boxy putter but with a more overstable, angled rim and a thumb track on the top of the flight plate. This makes it a unique addition to the blunt approach discs that make up a lot of the Munitions Line. If you love your Land Mine but want a little more fade toward the target, try the Proximity Mine. It is a slightly overstable, slow-speed approach disc that is great for short throws where accuracy is important and overthrowing the target is unwanted.
Clandestine plastic is a durable, tranlucent blend with a sparkly shimmer. It can become a player's secret answer to consistent throws and long-lasting discs.