I put about 50 of these in my horse barn. I saved money by getting them from dairy farmers that had gone from stall milking to parlor milking.
I paid about $5 a mat for the used dairy mats. Most of them were in good, or great, shape and saving $35 a mat adds up quick if you buy 50 of them. They seemed better made and heavyer than most of the "horse mats" I looked at in the AG and horse stores.
I had to cut several of them, I tired every thing, and by far the best was a chain saw. It half cut them and half melted them, at the same time.
I used a old dull chain and it worked great. It did leave some build up on the bar and chain saw, so I used a old chain saw I had. The build up came off the bar and saw with a little solvent , and it didn't seem to harm the saw in the long run.
Good luck.
Bartley