The Klein Tools 15-in-1 multi-bit screwdriver carry fewer tools. This screwdriver/nut driver comes with a fixed shaft and internal storage compartment for the screwdriver bits so they stay with the driver. Its 14 different bits used in HVAC applications plus a 1/4 inch nut driver should cover the range of all your bit needs. It includes nut driver bit (01/4 in), Phillip's bits (No. 0, No. 1, No. 2, No. 3), slotted bits(5/32 in, 1/4 in), square bits(No. 1, No. 2), torx bits(No. 10, No. 15, No. 20, No. 25) and other bits(Schrader valve insertion, core removal). It has cushion grip handle for greater torque and comfort