The APEX AM-5MM 5Mm Hex Power Drive 1/4 is the ideal screwdriver bit for all kinds of projects. This power drive bit has a hex shank, which means it can be used with an electric drill or screwdriver. The hex shank size is 1/4" and the overall length is 5mm. Made of proprietary steel and heat treated, this screwdriver bit has a finish that resists corrosion and rusting. It also features an overall length of 1 15/16". The APEX AM-5MM 5Mm Hex Power Drive 1/4 is the professional grade tool you need to complete your next project on time and without any issues.