HTS 121S6 6-In-1 Flat Head & Phillips Reversible Screwdriver Essential tool for every home Chrome vanadium double ended bits 5mm Flat Head / #1 Phillips and 7mm Flat Head / #2 Phillips Reversible stainless steel shaft locks in place with a spring-loaded ball bearing The shaft features a 1/4" nut driver on one end and a 5/16" nut driver on the opposite end