PB Swiss Tools has always been considered as the absolute best quality among the manufacturers of hand tools. A tool with an age of more than 137 years, which is considered to be the most luxurious type of hand tool and is used in sensitive industries such as helicopter and airplane maintenance. The quality and service life of this company’s tools are famous all over the world. The metal part of this set is made entirely of steel. PB swiss tools uses spring steel for the production of tools, which is produced exclusively for this company. The hardness of this steel is very high (58 to 60 HRC). The high hardness of the produced steel and its unique durability and spring ability are the result of decades of effort by steel suppliers for Swiss Tools products. The PB E6 989 screwdriver set includes all the necessary sets. This set includes 10 pieces of medium size E6 series. The series have a color scheme that, in addition to helping with faster selection, also acts as a protective plasma coating.