"Profi" series tools

Question

"Profi" series tools are introduced like premium class tools. What is the main difference between "Standard" and "Expert" series?

Answer

The difference is not only in design details; the main trait of "Profi" series pliers is that they all have a 5-petal pivot joint, that is more durable in comparison with the common round pivot joint.
Moreover, "Profi" pliers have chromium coating that is harder and more corrosion-resistant than nickel coating.
Are all double-layer tools of "Eхpert" series subjected to obligatory check every year?

Question

Are all double-layer tools of "Eхpert" series subjected to obligatory check every year?

Answer

Under the order of the Russian Ministry for Energetics #261 of 30th of June 2003, the tools with double-layer insulation should be visually checked every 6 months (par. 1.4.3). In case the second layer becomes visible during usage, it should be removed immediately. So there is not a requirement to check double-layer VDE tools under voltage every year.
Difference between VDE knives НМИ-01 and НМИ-01A

Question

What is the difference between VDE knives НМИ-01 and НМИ-01A?

Answer

The НМИ-01 knife has bigger butts and the angle of the butt is smaller that is better for work with cables of big cross-sections. Besides, the fixation of the butt of the knife НМИ-01А is different- it is done using argon-arc welding.
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