UNIVERSAL QUIK-LOK - Quick and easy accessory changes. Gives the end user extra bit length in hard to reach areas. * DOUBLE WING SPURS - Reduces vibration while preventing ?break out?. Spurs allow easy hole formation. * PATENTED CUTTING EDGE - Easier and faster wood boring over conventional models. Cutting edge removes chips fast, dissipating heat from the bit. * 1/4" QUICK-CHANGE HEX SHANK - For use in all Universal Quik-Lok Extensions. * Standard Equipment: 6" Universal Quik-Lok All Hex Extension; 6" Flat Boring Bits: 3/8", 1/2", 5/8", 3/4", 7/8",1", 1-1/8"; and Case.