Specifically configured tor service technicians in me electronics industry. The shaft opening serves as a 1/4" hex driver. Alloy steel shaft. Makes it EZ 2 find, change and store bits. Seven double end bits give you the 14 most popular screwdriver tips. Palm saver cap: Does not turn as you push on the cap and turn the handle to drive screws. No blisters in the palm of your hand. EZ guide collar: Helps maintain full contact between the bit and the screw for easier screw driving. Provides greater control. Drivers made in USA. 1-3/8" Diameter. 11-1/2" Extended length. The bit load is included with this driver: Phillips bit 0-3, 1-2. Spanner bit 6-8, 10-12. Square bit 1-2. Torx pin bit 10-15. Slot bit 4-6.