Specifications:
Diameter: 3mm / 0.12"; 4mm / 0.16"
Overall Length: 150mm / 6.0"
Material: HSS (High Speed Steel)
Hardness: HRC61~63
Package Included: 2pcs x 3mm Round Rod, 2pcs x 4mm Round Rod

Descriptions:High Speed Steel (HSS) is with high hardness, high wear resistance and high heat resistance, also known as high speed tool steel or sharp steel.
Widely used for processing milling cutters, sharp knives, gravers, punch press needles, bearings sleeve rods of machine tools, high hard ejector rods and center pins. Suitable for processing top circle, end face, bore, thread, plane, step, groove. Fit for using in copper, aluminum, unhardened steel items.
Tips: Please add some oil during storage and reduce contact with air or do not expose to air for rust protection. The surface is smooth, easy to shape, no cracks formed.
Meet Your Needs: Steel Rods can be easy to cut and formed into replacement parts for almost anything. You can cut to any size you want according to your needs.