ChrisNik Mag Spike – 3/8″ × 3″ (Box of 25) The ChrisNik Mag Spike 3/8″ × 3″ is a magnetized steel survey spike designed for establishing durable control points and property markers. Manufactured from premium steel with a zinc-coated corrosion-resistant finish , the spike retains magnetism for easy detection using a magnetic locator. The 3″ length makes it well suited for shallow installations in compacted soil and gravel. Each box contains 25 spikes for convenient field use. Key Features • 3/8″ × 3″ magnetized survey spike • Premium steel construction for durability • Zinc-coated finish for corrosion resistance • Magnetic properties for easy recovery with locators • 1″ diameter head with center point for precise marking • Packaged 25 spikes per box Ideal For Survey control points, property corner marking, and construction layout where a shorter magnetic spike is suitable for compacted soils and shallow installations.