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Zanac Hammer Drive fasteners deliver reliable performance for demanding construction and woodworking applications. These 1/4" x 3" drives feature a hardened steel construction designed to withstand repeated impact without stripping or deforming. The bulk 100-piece pack provides excellent value for contractors, builders, and DIY professionals tackling large-scale projects. Compatible with standard hammer drills and impact drivers, these fasteners ensure consistent penetration and secure fastening in various materials. Stock up on this essential hardware to keep your projects moving forward efficiently.