The Stanley No. 4 Smoothing Bench Plane is made has a gray, cast-iron base with precision-ground sides and bottom . It ft.s durable epoxy coating provides long-lasting protection. The hardened, tempered steel gives precision-ground cutter edge durability. The cutter adjusts for depth and alignment, offering precise control. It ft.s quick-release cam-lock makes iron removal easy. The high-impact polymer handles and knobs are contoured and polished.