This Simpson Strong-Tie SSTB16 18 Dia Anchor Bolt comes in a pack of 20 and is made of high-quality steel material. It is designed to provide reliable and secure fastening for a variety of applications. The bolt has a diameter of 18 inches and is suitable for use in inches. The anchor bolt is ideal for use in the construction industry and is commonly found in other fasteners and hardware applications. The Simpson Strong-Tie brand is known for its quality and durability, making this anchor bolt a top choice for professionals.