Irwin 1837535 1/4" Magnetic Lobular Impact Nutsetters x 1-7/8" Length - 10 per Package Lobular design drives fastener on side instead of corner for less stripping and longer life Rare earth magnets hold fasteners securely with four times the hold of standard magnets 1/4" quick-change hex shank designed to work with impact drivers & reduces slipping in drill chuck 1/4" Hex Drive Nutsetters x 1-7/8" Overall Length 10 Nutsetters per Package