I agree with Rick too. I use a dab of epoxy in the hole of the material,no matter if it's horn, wood or tubing. I also wrap one end of the bristle with thread which stiffens the end going into the hole and makes it easier to get it in. I also use horse hair which is cheaper and probably easier to find than boar's bristle. Horse hair is good to practice on to get the procedure right. Good Luck on your project. I enjoy making the pan brushes.