Home Slickdeals Bosch Impact Tough 15-Piece 1/4-in x 2-in Square/Robertson Impact Driver Bit Set.... Slickdeals Bosch Impact Tough 15-Piece 1/4-in x 2-in Square/Robertson Impact Driver Bit Set. $2.59 @ Lowes. YMMV. By ARCOM - 22 April 2020 118 0 SHARE Facebook Twitter Go to the deal page: Bosch Impact Tough 15-Piece 1/4-in x 2-in Square/Robertson Impact Driver Bit Set. $2.59 @ Lowes. YMMV.