This is the 1-3/4 inch giant spike. Each screwback spike comes with a large screw for fastening onto clothing, bracelets or anything. For each quantity, you get 20 spikes. This spike is solid aluminum.

Screwback Spike description
height: One and 3/4 inches (45 mm)
base: 3/4 inch (19 mm)
color: unpolished-silver
base: aluminum
screw type: inch- 1/4-20, 1/2" length
shape: giant round tree-like spike