These ANEX 1000v insulated philips bits are a great addition to anyone working on electrical installations. We have two sizes for the philips bits. 150mm and 100mm.
Both of these will fit your standard western style 1/4" shank impact drill collets and the japanese deeper collets that the vessel p1 electric screwdriver have.
Also check out the other version we sell which has both philips and flat blade. This other version will only fit the japanese deeper collets and wont fit your western style impact drill collet.