This screwdriver set is insulate ones, it can reach to 1000v, and it has passed GS. The shafts can be made in CRV or CS materials, but the price is differents. Our company is in the line of handtools, screwdrivers and tool sets, hope you to came to our company's website to have a look. Srewdrive is commen used in famliy and industry, this screwdriver also can be made in S2 meterials and the handle can be made in TPR and PP passed Rohs. The steel can be do as black tips.