Something new we are offering...carbon fiber spikes. Very lightweight, noncorrosive, and low profile they make a good backup self defense item. Available wrapped in several colors, in 2 tip types...chisel tip or needle tip. Both tip style function about the same so tip type is personal preference. We also offer tube/hypodermic style under another listing.
I actually put off doing these for years because I wasn't sure how strong they would be. Well after finally getting around to making some test pieces and literally hammering them through 1" thick wood with a deadblow hammer...I'm impressed. A tiny portion of tip does get rounded off doing this, but there was zero structural damage after hammering it through dozens of times. The dulled tip can easily be sharpened on a regular sheet of sandpaper(400 grit works well) in a few seconds to minute depending on experience. These are intended for soft targets, (use a nail if you want to hammer through wood), but they can definitely hold up to some abuse.
Being very lightweight, they don't work well as a throwing spike...its like trying to throw a straw with force.
Ground from solid nonwoven carbon fiber
6mm diameter (just under 1/4"..which is 6.4mm)
6" length (length will vary slightly due to being handmade)