SpliceMaster® Sandpaper Rolls contain 50 yards of 1-inch-wide non-conductive aluminum oxide sanding cloth for removing semi-con shield residue, jacket polymers, and other contaminating materials from electrical cable insulation during splicing. Such deposits must be removed prior to splicing electrical cable since they can lead to tracking or arcing. Standard, store-bought sandpapers and abrasives can leave conductive grit residues that could lead to cable failure and hazardous conditions. Only non-conductive sanding materials should be used. NEVER ABRADE AN ENERGIZED CABLE.