Johnson's easy-to-use 12 in Structo-Cast combination square gives you the accuracy and precision you need for every job. Its stainless steel blade has English graduations of 1/8 in, 1/16 in and 1/32 in that are permanently stamped, so you'll never worry about them wearing or fading. It also features a durable acrylic vial and heavy-duty Structo-Cast molded reversible head with a lock bolt and steel screw to ensure your measurements are spot-on every time.