Buyers must prioritize the diamond concentration and grit size; a higher concentration ensures longevity, while a finer grit provides a smoother finish. The segment height (typically 7mm to 12mm) directly impacts the blade's lifespan. Additionally, ensure the core material is made of high-quality 65Mn steel to prevent warping under high-temperature friction. For professional use, look for laser-welded segments rather than sintered ones to ensure maximum safety and durability during heavy-duty cutting.