DeWalt Rotary/Percussion Masonry Drill Bits feature a 1/4"" Hex Shank for compatibility with quick load system drills and an aggressive tip design for easy material penetration. Suitable for drilling into concrete, masonry, natural and artificial stone, and brick. Specifications: Drill Bit Size Metric: 16mm Effective Length: 230mm Overall Length: 400mm Product Range: DeWalt - Masonry Drill Bits Country of Origin: China