For B2B procurement, the material is the most critical factor for durability and precision. You should prioritize Medical-Grade Stainless Steel (304 or 316L) for general beauty and medical use, as it offers superior corrosion resistance and sterilization compatibility. For electronics or laboratory settings, look for Anti-magnetic and Anti-acid properties to prevent interference with sensitive components. Additionally, ensure the Hardness Rating is at least HRC 40-45 to prevent the tips from bending or dulling over time.