Powers Fastening Innovations 02276 Wall-Dog - 1/4-Inch by 1-1/2-Inch Black Phosphate Pan Head Light Duty Anchor, 100 Per Box Installs in wallboard, plywood, concrete, hollow or grout filled block, brick and plaster Patent design provides for smooth entry clean, cutting and a strong hold 100 per box Thread design prevents spinning and stripping Heat treated point can penetrate metal and wood studs