This attachment threads directly into our Wax Pen Holder and heats up very quickly. One thing to remember when working with wax paints is that palette knife work is much different than knife work with oils or acrylic paints. The process can be viewed as more subtractive and manipulative work. The heated blade is great for carving into the wax and pulling or digging into the wax surface. However it is not a means to add paint to a surface because the heat will cause the paint to drip right off the knife. Knife blade is 3/4" wide and length out is 3/4" at the tip. Note: This image has been enlarged to better illustrate the shape of this tool.