Procurement of thick sheet metal (3 mm and above) to bend at home will be easier if bend line is pre – “grinder” to make an incision to a depth of at least half a millimeter. A. MATVEICHUK, Zavodoukovsk, Tyumen region.

Procurement of thick sheet metal (3 mm and above) to bend at home will be easier if bend line is pre – “grinder” to make an incision to a depth of at least half a millimeter.