Not suitable for rings with stones, very thin designs, or hard metals like titanium, , and stainless steel to prevent damage. Made from sturdy 45 steel, ensuring long-lasting performance and resistance to wear during extensive use. Convenient step-by-step process; ring on the collet, gently tap the tapered pin with a hammer, and use the mandrel for final adjustments. Designed for ring sizes 7.5-10.5 (US), accommodating diameters from 0.74" to 0.96". Ideal for adjusting soft metal rings such as silver, gold, and copper. Designed for both home and professional use, its compact form factor allows for easy storage and workspace efficiency., Weight: 0.75839018128 pounds, Manufacturer: Uxsjakjsd