Teng Tools - 6 Piece Screwdriver Set (Flat,PH) - MD906N3 Screwdrivers - Flat regular - 3 x 75mm, 4 x 100mm, 5.5 x 75mm, 6.5 x 100mm Screwdrivers - PH type - PH1 x 75mm, PH2 x 100mm Bi-material handle is designed to suit either your need for power transfer or speed. Steel alloy TT-MV plus blades which gives 20% greater capacity than standard screwdrivers. Lifetime Guarantee