CHINA PRODUCTS - Concrete Screws
Concrete screw is designed for quick, safe, secure fastening for a variety of jobs in concrete, brick and cinder block.
The depth is important to fasten concrete screw. Predrill holes need to make a 1/4 inch deeper than screw before fastening the concrete screw that avoid the dust accumulating from the drilling processing in the end of hole.
Concrete screw can fit steel and stainless steel versions enable use in cracked and non-cracked concrete, indoors and outdoors, and area with earthquake.