BEYOURD metal D rings are made of heavy-duty 304 stainless steel, inner diameter: 5/8"(15mm) ,3/4"(20mm), 1" (25mm), 1.5"(40mm) 2"(50mm). wire thickness: 1/8 inch(3mm), 5/32"(4mm), 3/16 inch(5mm), 1/4 inch (6mm), 5/16 inch (8mm). steel Semi-circular rings suitable for webbing, straps and rope. The solid welded, gap-free round rings are smoothly polished to reduce sharp edges and burrs, helping protect dog collars, leashes, harnesses and macrame cords from damage. Each silver-tone D ring set includes 15 pieces packed in a recyclable plastic box, easy to carry, store and use for DIY leather, cord and strap connecting projects such as pet collars, backpack straps, camping gear and hanging straps.