Irwin 394100 7 Piece Power Grip Nut Buster Set.
Works with most popular tools: 1/4 in. shank for use with cordless drills, impact drivers, corded drills and nut runners. Power groove allows for use with quick change adapters.
Maximum gripping power: reverse spiral flutes are designed to bite down.
Shear resistant shank: High carbon steel shank is larger than most fastener shanks and resists torsional shear.
Grips both metric and SAE: Universal Lobular design fits both sizes.
Black Oxide finish with white markings: prevents rust and has easy to read markings.
Easily removes damaged screws and bolts (stripped, rusted and broken).
Includes: 1/2 in., 7/16 in. (11mm), 10mm, 3/8 in., 5/16 in. (8mm), 1/4 in. and 3/16 in.
Packaged in a blow molded case.
Ships via UPS.