I had a chance to use the Intensive cut 3/16" Husky files this week and I must say I'm impressed. They are an aggressive cut file but leave a smooth burr free tooth upon sharpening completion. I've used most all brands except Save Edge brand, and these Intensive cut files are the best so far. I did a search on here for this particular file and did not turn up anything so I am letting you all know. Husqvarna says it's an upgraded design with 20% better cutting performance and longer lifetime.
http://www.husqvarna.com/nz/accessories/chainsaw-accessories/intensive-cut-files/
http://www.husqvarna.com/nz/accessories/chainsaw-accessories/intensive-cut-files/