Review on S-140 Magnetic Silicone Soldering Mat Heat Resistant Work Mat For Electronics Repair, Phone, Soldering Iron, BGA, Workbench - Size: 13.8 X 9.8 Inch, 932°F Maximum Temperature Limit by Yousef Abood

its nice for watchmakers because u can put tiny screws/jewels in the small squares, and the bigger parts they came out of next to them in the bigger "holding areas" to keep track of everything. then you can put more sensitive parts like springs etc up top and out of the way- until you get them safe in a parts holder. the mat is soft enough to keep from accidentally bending a pivot on a gear if you drop the movement. plus it wont scratch anything. under bright light for hours, the color is still easy on my eyes somehow and it makes it possible to find tiny springs that ping off. this also keeps my screwdrivers/oilers from rolling around.