The hexagonal slugs are just mild steel and have a tapped 6-32 threaded hole. Below are pics with dimensions. Each hexagonal slug is approximately 30.7 grams. (22) hexagonal pieces give you about 1.5 lbs added weight. $75 shipped to your door for 22 pieces. I only have 1 set. As far as the tungsten weights I have.....it appears they are spoken for. I am awaiting payment.