GRK 00105 R4 Multi-Purpose Framing Screw, #9 x 3-1/8", 1900-Count BackToSchool Perfect for making copper crimp

Perfect for making copper crimp ring connections in potable water lines

Ideal for cleaning high corners and crown molding moldings

standard 1-3/4" installation

Heavy duty 210D nylon walls

GRK 00105 R4 Multi-Purpose Framing Screw, #9 x 3-1/8", 1900-Count BackToSchool Perfect for making copper crimpThis design enhances the R4's versatility by allowing the fastener to countersink into even the hardest woods. The head of the screw closes the hole off with precision leaving no damaged fibers around the head. R4 screws 2" and longer have a four threaded CEE Thread. This enlarges the screw hole for the non threaded portion of the fastener, allowing the wood to settle easily. It increases the screw's drawing strength and reduces the friction on the