Fastenmaster Headlok Screw 4.5 in. 12 Count combines patented HeadLOK fastening technology with premium steel construction for fast, reliable wood-to-wood connections. The sharp gimlet point and aggressive threading drive effortlessly into wood or OSB without pre-drilling—saving you time and labor on deck framing, stair stringers, fencing, cabinetry and more. Each wafer-style head delivers exceptional pull-through strength without the need for washers, and the included Spider Driver bit virtually eliminates cam-out for a smoother, more efficient install.

Built from ACQ-approved steel with a durable black finish, these screws outperform traditional 3/8" lag screws in shear values while maintaining superior corrosion resistance. Whether you’re a professional contractor or a dedicated DIYer, the Fastenmaster Headlok Screw 4.5" ensures a stronger, faster fastening solution on every project.

Key Features

• No-pre-drill installation with sharp gimlet point
• Patented Spider Drive recess reduces cam-out and bit wear
• Wafer-style flat head increases pull-through resistance—no washers needed
• Aggressive threading delivers higher shear values than 3/8" lag screws
• ACQ-approved steel finish for long-term corrosion resistance
• Includes free Spider Driver bit for quick assembly