Irwin (928) IWAF34212 Irwin IWAF34212 Nutset Impact Mag 1/2 Inch By 1-7/8 Inch

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 in quick-change shank is designed to work with impact drivers and reduces slipping in standard drill chucks.