POWER-GRIP 394100 Bolt Extractor Set, 7-Piece, HCS, Black Oxide, Specifications: Reverse Spiral Flute

Extract rounded off, rusted tight or painted-over bolts. Reverse spiral flutes are designed to bite down to provide maximum gripping power. High carbon steel ensures longer life and greater durability. Universal lobular design fits all types of fasteners. Set includes bolt extractors to remove bolts size of 8 mm, 10 mm, 11 mm, 3/16 in, 1/4 in, 5/16 in, 3/8 in, 7/16 in, 1/2 in with 1/4 in drive. Plastic case.