1 The mat add built-in scale ruler (0 ~ 36cm), 124 screws position and 3 pcs part boxes with lid, 18 notches to make your work easy. 2 It is made of high quality silicone 3 The mat has excellent heat insulation performance, the soldering iron can directly solder in the mat. 4 Anti-Slip and Anti-static Design, both surface and back side are adopting the anti-slip design. 5 It is an ideal product for soldering electronics assembly or electronics and circuit board repair.