ChrisNik Mag Nail – 3-1/2″ x 1/4″ (Box of 100) The ChrisNik Mag Nail 3-1/2″ x 1/4″ is a heavy-duty magnetized survey nail designed for deeper control point installations and long-term field durability. Manufactured from hardened steel and finished with a zinc-plated corrosion-resistant coating , the nail retains magnetism for easy detection using magnetic locators. The extended 3-1/2″ length provides added holding power for installations in asphalt, wood, and compacted surfaces. Each box includes 100 nails for efficient field use. Key Features • 3-1/2″ x 1/4″ magnetized survey nail • Hardened steel construction for strength and durability • Zinc-plated coating for corrosion resistance • Magnetic properties for easy recovery with magnetic locators • Packaged 100 nails per box Ideal For Surveyors and construction crews installing deep control points, benchmarks, and long-term layout references where maximum holding strength and reliable magnetic detection are required.