General Tools 70210 20 Pc Express Ratcheting ScrewdriverThis General Tools 20 Piece Express Ratcheting Screwdriver uses patented tech for a faster drive just hold the collar and switch the handle direction clockwise and counterclockwise. It comes with four types of blades: 1 16", 5 64", 3 32" and 1 8" slotted; PH0, PH00, PH000 & PH1 Phillips; T3, T4, T5, T6, T7, T8, T9, T10 & T15 Torx; PZ00, PZ0 & PZ1 Pozidrive. Plus, a handle, Twenty standard 4mm hex shank precision bits and Two bit holders. Blade types