The Weiler ST-4 is a stem-mounted twisted wire scratch brush featuring .020-inch diameter stainless steel fill wire, designed for deburring, cleaning, and surface preparation on metal workpieces. The compact 3/8-inch face width and 1-1/4-inch diameter make it ideal for detail work in confined areas using a die grinder or drill.
Constructed with high-quality stainless steel wire for corrosion resistance and long service life, this brush is well-suited for use on stainless steel, aluminum, and other metals where contamination from carbon steel must be avoided. A reliable choice for MRO, fabrication, and maintenance applications.