Attributes . Ideal for Use On Stubborn or Damaged Fasteners, Design Allows for Quick and Easy Socket Engagement to The Fastener Flats, Configuration Employs A Radius Corner Design, Minimizing Slippage, Internal Design Minimizes Fastener Rounding, Helps to Extend Fastener Life, Allows The User to More Easily Turn Worn, Rounded, or Rusted Fasteners . Names