The grades of four household products stocks are on the rise this week on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Spectrum Brands Holdings, Inc. (SPB) is progressing from last week’s rating of B (“buy”) as the company improves to an A (“strong buy”) this week. Spectrum Brands Holdings manufactures batteries, pet food, and lawn care products. In Portfolio Grader’s specific subcategory of Equity, SPB also gets an A. For more information, get Portfolio Grader’s complete analysis of SPB stock.

Central Garden & Pet Company Class A (CENTA) earns an A this week, jumping up from last week’s grade of B. Central Garden & Pet produces and sells products for the pet, and lawn and garden supplies industries primarily in the United States. For more information, get Portfolio Grader’s complete analysis of CENTA stock.

Clorox Company (CLX) boosts its rating from a B to an A this week. Clorox makes consumer products that are sold through mass merchandisers and other retail outlets. At present, the stock has a dividend yield of 3%. For more information, get Portfolio Grader’s complete analysis of CLX stock.

WD-40 Company’s (WDFC) grade is moving up to a B (“buy”) this week from last week’s C (“hold”). WD-40 provides easy-to-use solutions for a wide variety of maintenance issues. For more information, get Portfolio Grader’s complete analysis of WDFC stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.