The Original MagnaTek mat comes with 36 embedded magnets.
MagnaTek mats are flexible, non-slip, chemical resistant, Rated to 500 degrees Fahrenheit. Silicone rubber tool mat that will stick to clean smooth surfaces by friction. Each mat measures 21"x17"x.25
Colored Version 2 comes in Red and Green with a Higher lip around the edge for fluid retention (up to 5 cups). No tip holders, and 42 embedded magnets that can be reversed polarity if needed.