This is the second foot file that I have tried and it is awful. They proclaim a flexible head but you cannot even put the weight of this unit on your foot before it stops working. I knew I was in trouble when I opened the box and it had dollar store batteries in it. Also the rollers were very ineffective, they hardly removed anything. Mind you I do not have rough calluses either. The quality of this product was like it was a free promotion at a trade show. I bought it because of the positive reviews but now I wonder where those reviews came from because they certainly were not talking about this unit.

I can confirm that this is the ONLY HDMI Hight Speed cable that works with 4K resolution at 60Hz with full 4:4:4 chroma. I have a Panasonic CX700 UHD TV combined with a GTX 960 GPU ( HDMI 2 output) and when connected using this cable both the 6 feet and 10 feet AMAZON HDMI cable works like a charm.