Upgrade your jointer with STARIBS 4-1/8" HSS planer knives, replacement blades for Grizzly H3874 and Sears Craftsman 149-series jointers. Made from high-speed steel (HSS) and hardened to HRC 60-63, these knives deliver clean cuts and consistent performance on hardwood and softwood. Each knife measures 4-1/8" × 7/8" × 5/64" (≈ 4.173" × 0.862" × 0.072") with three locator slots for accurate fit and easy installation. Sold as a set of two, securely packed in a plastic case for safe storage and transport. Produced by a factory with over 30 years of experience in planer blade manufacturing, ensuring steady quality for woodworking applications.