The 6-in-1 screwdriver from Hobby Tool Supply is an essential tool for every home. It includes two chrome vanadium double ended bits in 5mm Flat Head / #1 Phillips and 7mm Flat Head / #2 Phillips. The removable stainless steel shaft locks in place with a spring-loaded ball bearing and is also reversible, featuring a 1/4" nut driver on one end and a 5/16" nut driver on the opposite end. Measures approximately 6-3/4" in length.