Set of OKBOONS brand HSS 4241 step drill bits designed for drilling through various thin materials.
Set Composition: Includes three conical bits in sizes 4-12mm, 4-20mm, and 4-32mm.
Material Compatibility: Suitable for aluminum, copper, plastic, and thin sheet metal.
Features: HSS 4241 construction offers heat resistance, and the conical shape allows for enlarging existing holes or creating multiple hole sizes with a single bit.