Irwin  POWER-GRIP  7 pc. Multi Size  Screw
*Sub Brand: POWER-GRIP
*Extractor Size: 1/2 in.
*Material: High Carbon Steel
*Product Type: Double-Ended Screw Extractor Set
*Extractor Length: 4 in.
*Number in Package: 7 pc.
*Packaging Type: Clamshell
*Minimum Contact Size: 3/16 in.
*Maximum Contact Size: 1/2 in.
*Designed for use with power tools
* Fits most power tools
* When faced with a rounded-off, rusted-tight or painted-over bolt, bolt extractors will break it free
* Reverse spiral flutes are designed to bite down to provide maximum gripping power
* Universal lobular design fits all types of fasteners