DeWalt - Best Deals and Sales at Amazon
Amazon has the DEWALT DW4528 4-1/2" x 1/8" x 7/8" Concrete/Masonry Cutting Wheel for $2.30 with free shipping on $25+ or with Prime. Good Amazon reviews.
Universal fitment for use on all major brands.
Amazon has the DEWALT DW2161 21-Piece Screwdriving & Nutdriving Set for $7.51 with free shipping on $25+ or with Prime.