This week, three Machinery stocks are improving their overall rating on Portfolio Grader. Each of these rates an “A” (“strong buy”) or “B” overall (“buy”).

IDEX Corp. (NYSE:IEX) is making progress this week as its rating of C (“hold”) from last week increases to a B (“buy”) rating this week. Idex designs, manufactures, and markets a variety of pump products, dispensing equipment, and other engineered products. Shares of IEX have increased 6.3% over the past month, better than the 1.4% increase the S&P 500 has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of IEX stock.

Snap-On Inc. (NYSE:SNA) is making headway this week, with the company’s rating improving to an A (“strong buy”) from a B (“buy”) last week. Snap-on conceives, manufactures, and markets of tools, diagnostics, equipment, software, and service solutions for professional clients. For more information, get Portfolio Grader’s complete analysis of SNA stock.

This is a strong week for TriMas Corp. (NASDAQ:TRS). The company’s rating climbs to B from the previous week’s C. TriMas manufactures trailer products, recreational accessories, packaging systems, energy products and industrial specialty products for the commercial, manufacturing, and consumer markets. Wall Street has pushed the stock higher by 8.4% over the past month. For more information, get Portfolio Grader’s complete analysis of TRS 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.