GRK Fasteners RSS 10235 Structural Screw, 5/16 in Thread, 6 in L, Washer Head, Star Drive, Steel, 300 BX Clamps / Fastening Tools The second air chamber is

The second air chamber is designed to maintain suction to the wall during the drilling application

With great cutting power and a lighter weight design

they are less resistant to rusting

the pattern is underneath the work

GRK Fasteners RSS 10235 Structural Screw, 5/16 in Thread, 6 in L, Washer Head, Star Drive, Steel, 300 BX Clamps / Fastening Tools The second air chamber isGRK's RSS screw is made of specially hardened steel to provide you with high tensile, torque and shear strength. The sharp threads and points bite instantly into the material (including hardwood), reducing the splitting effect due to smaller shanks. RSS screws that are 3 1 8 in and longer have CEE threads which enlarge the screw hole for the non threaded portion of the fastener, allowing the wood to settle easily and increases the screw's drawing