This is the 2-3/4 inch giant spike, our largest spike we have. Each spike comes with a screw for fastening. This spike is solid non-polished aluminum.(These items have a trace amount of zinc plating to help prep for other plating. These spikes can be plated but may not be anodized.)

Screwback Spike description
height: Two and 3/4 inches (70 mm)
base: 3/4 inch (19 mm)
color: unpolished-aluminum
base: aluminum
shape: giant round tree-like spike
screw type: inch- 1/4-20, 1/2" length
unit size: single spike per quantity ordered