I love this test tube holder and use it to keep my brushes in their own tube. However, the plastic tubes I bought slipped out of the little indentations on the bottom when I replaced the brushes after use. I had to glue a strip of velcro to the bottom and then a piece of velcro to the bottom of each tube. I also use a stand to hold my saw blades and I also attached it with velcro. I also had to glue both holders to the sides of the rack. They kept slipping out. Now everything works fine. Watch out for Eisco Labs - make the bottom dents deeper, and a little glue on the rack helps too.
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