AerosmithŽ’s Stainless Steel Sure-ConŽ is a light to medium duty mechanical anchor that is made from 410 Stainless steel. It is available in both a finished Hex head or Phillips head in 3/16 and ŧ diameters up to 3 ž in length. Its properties allow this screw to be used in internal applications but can also be used in some external applications where applicable. The product is designed to be used in concrete, brick and block and requires installation using a Sure-ConŽ drill bit for maximum performance. A drill bit is included in each box of screws. Installation is fast and easy, just predrill your hole using the proper Sure-ConŽ drill bit to the required depth and run your screw through your fixture either using a cordless/corded screw gun or impact using the required torque value.