Bulk 100 Pack - 1" Key Rings - Heat Treated & Lead Free - Heavy Duty & Durable Premium Split Ring Keychains by Specialist ID HEAVY DUTY HIGH QUALITY KEY CHAIN RINGS - Heat Treated and Lead Free -The benefits of heat treated steel are increased strength, hardness, toughness, and wear resistance. It should be a lot harder for you be able to bend it and break it. JUST UNDER ONE INCH - PERFECT SIZE at 15/16" (24mm) diameter, these split rings don't take up extra space and are perfect for Car Keys, House Keys, Organizing and Arts and Crafts BULK 100 PACK BLANKS FOR CRAFTING, LANYARD MAKING, LEATHER CRAFTS - The perfect addition to any maker's supply shop. Tons of uses. SUPER STRONG / SMOOTH ROUNDED SPIRAL EDGE- Custom made especially for Specialist ID. Be mindful of imitations out there of unknown origins. Our products are safe, strong, super high quality and lead free. STURDY AND DURABLE FOR HOME OFFICE & MAKING - Great for Car Dealerships, Landlords, Wood, Textile, and Metal Working and More!