Nos. K151 and K152 are heavy-duty frames that accept 8, 10 or 12" (200, 250 or 300 mm) blades which can be mounted in any one of four cutting directions, tensioned by a single wing nut. Nox. K151 and K152 furnished with one high-speed steel blade. No. K150E has a lighter-duty design and accepts 10 or 12" (250 or 300 mm) blades. Red and orange handles are easy to see on a crowded workbench. No. K150E is furnished with one all-purpose carbon steel blade.