Stanley FatMax Screwdriver Insulated Parallel Packaged 4mm x 100mm An industrial grade - 1000V a.c. insulation - Tested to EN60900:2004 meaning that that this screwdriver is suitable for live working use up to 1000V a.c Chrome vanadium steel bar allows for high torque and reduces the chance of tip breakage Colour coded ends make it easy to identify the correct screwdriver for each screw type Extremely tough Polyamide blade insulation sleeve makes it resistant to impact at -25 degrees centigrade and ensures increased abrasion resistance and reduced moisture absorption Individually tested to 10, 000 volts Large diameter handle offers great torque needed for driving wood screws Shot blasted tips ensure improved torque and corrosion protection Smooth domed end for fast spinning action speed and comfort Soft grip handle perfect combination of great grip plus reduces fatigue The Ergonomic handle design offers both a large diameter for increased torque and a small diameter shaft ensuring hi