These are the same screws we use in the manufacture of our fire props. The fan wick screws are used to hold the continuous wicks on our fans. The fire hoop screw is used to hold our non-breakdown hoops together. The staff screws, are a self drilling screw that can go completely through the Kevlar into the aluminum tubing without pre-drilling a hole. The washer goes with the #8 screw to keep the screw head from pulling through the Kevlar. If you're making your own staff you will need one washer per screw. We typically use one screw for each inch of Wick, plus one more screw on the backside of the wick.