Mazel duplex nails are double-headed steel nails designed for temporary construction where the fastener will be removed -- concrete forms, scaffold ties, ladder and stair bracing, temporary partitions, shoring, and similar work. The lower head drives flush with the wood for full pull-out strength while the upper head stays exposed about 1/4" above the surface, giving a hammer claw or pry bar a clean grip to pull the nail without splintering the lumber when the form or shoring comes down.

• Penny size: 16d (3-1/2" length, 8 ga / ~0.162" shank diameter)
• Double-head (duplex) design for fast, clean removal during teardown
• Lower head sets flush against the lumber; upper head stays exposed about 1/4" proud for claw or pry-bar grip
• Smooth shank for easy driving and easy withdrawal
• Bright finish (uncoated carbon steel) for interior and dry-exterior temporary service
• For concrete forms, scaffold ties, ladder and stair-rail bracing, temporary partitions, shoring, formwork
• Not engineered for permanent or weather-exposed fastening (step up to galvanized common or sinker nails for permanent work)
• Pack: 50 Lb Box

Tip: jobsite bulk box for large framing-scale concrete forming, heavy shoring projects, and deep-batch stock for crews running back-to-back wall and slab pours. Drive the nail until the lower head sits flush against the lumber surface and the upper head stays about 1/4-3/8" proud; to remove, slide a hammer claw or pry bar under the upper head and pull straight back -- the lumber releases cleanly without the splintering that flush-driven common nails leave behind.