Jul 18, 2018 · GRK's RSS screw is made of especially hardened steel to provide you with tensile, torque and shear strength. The sharp threads and points bite instantly into material (including hardwood), reducing the splitting effect due to smaller shanks. The round head with built-in shield (washer type head) has no sharp edges like conventional lag screws.Everett SteelEverett Steel is a full service steel supplier. We carry an extensive inventory of Steel and Aluminum Bars , Beams , Channels , Plate , Rounds , Sheets , Tubing etc. We procure steel, aluminum, stainless steel, brass, copper and other metal products ranging from the simplest to the most complex to satisfy our customers needs.