Investors interested in stocks from the Consumer Products - Staples sector have probably already heard of Newell Brands (NWL) and WD-40 (WDFC). But which of these two companies is the best option for those looking for undervalued stocks? Let's take a closer look.Everyone has their own methods for finding great value opportunities, but our model includes pairing an impressive grade in the Value category of our Style Scores system with a strong Zacks Rank. The proven Zacks Rank puts an emphasis on earnings estimates and estimate revisions, while our Style Scores work to identify stocks with specific traits.Newell Brands and WD-40 are both sporting a Zacks Rank of # 2 (Buy) right now. This system places an emphasis on companies that have seen positive earnings estimate revisions, so investors should feel comfortable knowing that these stocks have improving earnings outlooks. However, value investors will care about much more than just this.Value investors analyze a variety of traditional, tried-and-true metrics to help find companies that they believe are undervalued at their current share price levels.Our Value category grades stocks based on a number of key metrics, including the tried-and-true P/E ratio, the P/S ratio, earnings yield, and cash flow per share, as well as a variety of other fundamentals that value investors frequently use.NWL currently has a forward P/E ratio of 9.83, while WDFC has a forward P/E of 38.72. We also note that NWL has a PEG ratio of 1.64. This popular metric is similar to the widely-known P/E ratio, with the difference being that the PEG ratio also takes into account the company's expected earnings growth rate. WDFC currently has a PEG ratio of 3.87.Another notable valuation metric for NWL is its P/B ratio of 1.34. The P/B ratio is used to compare a stock's market value with its book value, which is defined as total assets minus total liabilities. For comparison, WDFC has a P/B of 16.19.These are just a few of the metrics contributing to NWL's Value grade of A and WDFC's Value grade of F.Both NWL and WDFC are impressive stocks with solid earnings outlooks, but based on these valuation figures, we feel that NWL is the superior value option right now.Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Newell Brands Inc. (NWL): Free Stock Analysis Report WD-40 Company (WDFC): Free Stock Analysis Report To read this article on Zacks.com click here.