GRK 10221 UberGrade Rugged Structural Screw, 5/16" x 3-1/8", 500-Count BF20 Multi Shield is the ultimate

Multi Shield is the ultimate product used to protect hard floors and other surfaces from damage on the jobsite

meets CSA requirements

2A USB port – 2x faster

High-contrast black text on a white background provides for an easy-to-read screen to view incoming Caller ID or review call history

Casing Material : Steel

GRK 10221 UberGrade Rugged Structural Screw, 5/16" x 3-1/8", 500-Count BF20 Multi Shield is the ultimateGRK's RSS Rugged Structural 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 which are 3 1 8" and longer have a six threaded CEE thread that enlarges the screw hole for the non threaded portion of the fastener, allowing the wood to settle easily and