Megapro 151HVAC-U Alloy Steel Hex HVAC Multi Bit 15 in 1 Screwdriver, 1/4" Hex Driver, 5/16" Hex Nut 15-in-1 screwdriver set with 15 interchangeable bits for installing and repairing HVAC equipment Includes five flat bits, six Phillips-head bits, a square awl reamer bit, a Schrader valve stem, a 1/4" hex-nut driver, and a 5/16" mini nut driver with a hex nut clip Retractable bit cartridge in the handle provides storage for seven bits Bits are made of S2 stainless steel for strength and durability Alloy steel shaft serves as a 1/4" hex-nut driver Made in the USA