This Faithfull Screwdriver Bit & Socket Set Contains A Mix Of The Most Commonly Used Screwdriver Bits And Popular Sizes Of 1/4In Hex Sockets. Two 1/4In Drive Adaptors Are Included That Enable The Screwdriver Bits Or Sockets To Be Used With A Power Tool. The Set Is Supplied With A 1/4In Drive Ratchet Ring Wrench And Adaptor Allowing The Use Of Both Sockets And Screw Bits In Confined Spaces.