I started with a shed deer antler that I picked up in the woods last spring , they can also be purchased online.
I cut around 2 inches off 1 of the tines. Always use safety glasses and a dust mask when cutting, and used a pencil to draw a spiral around the antler from top to bottom keeping around ¼ inch between rounds.
The ones at the tip are a little closer together and the ones at the base are a little farther apart.
Pro Tip: Safety Warning:
Cutting and grinding antler and bone creates a fine dust that can be a hazard to your health always use mask and work in well ventilated area. Always use safety glasses when using power tools