The grades of 4 Household Durables stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

NACCO Industries, Inc. Class A (NC) improves from a C to a B rating this week. NACCO Industries, Inc. Class A manufactures and markets forklift trucks and related service parts, as well as mines and markets lignite coal for use as a fuel in power generation by electric utilities. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of NC stock.

Flexsteel Industries, Inc. (FLXS) is seeing ratings go up from a B last week to a A this week. Flexsteel Industries, Inc. manufactures and sells wooden and upholstered furniture for the retail, contract, and recreational vehicle furniture markets. The company also gets A’s in earnings revisions. For more information, get Portfolio Grader’s complete analysis of FLXS stock.

This week, iRobot Corporation’s (IRBT) ratings are up from a C last week to a B. IRobot Corporation engages in designing, developing, and marketing robots for the consumer, government, and industrial markets worldwide. The company also gets A’s in sales growth, earnings growth, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of IRBT stock.

This is a strong week for Green Brick Partners, Inc. (GRBK). The company’s rating climbs to B from the previous week’s C. The company also gets A’s in sales growth, operating margin growth, earnings surprise, and free cash flow. For more information, get Portfolio Grader’s complete analysis of GRBK 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.