Screw Fastened Clip:The Clip with Screw Fastened On The Back Is Easy To Attach and Is Not Easy To Fall Down From The Things That It Is Attached To. You Can Use The Retractable Keyring with The Clip Attached To Your Belt Buckles, Pockets, Lanyards, Backpack S and Other Portable Bags. .Thickened Steel Wire: The Upgraded Steel Wire of The Retractable Keyring Is Thickened, Which Is Much Bigger and Stronger Than Others. The Diameter of The Key Reel Is 4 Cm/ 1.55 Inches. The Steel Wire Is Approx. 70Cm/ 27.5 Inches Long. Since It Is Enhanced, It Is Not Easy To Get Broken. .Professional Design: The Retractable Cable Allows You To Swipe Your Id Card Without Removing It. Also You Can Open Doors Without Taking Your Keys Off Your Belt. This Will Make Your Life Much More Convenient. .High-Quality Material: Metal Zinc Alloy Design, Corrosion-Resistant, Wear-Resistant, Durable, Thickened Steel. After Tens of Thousands of Tensile Tests, The Steel Wire Is Not Easy To Break. Excellent Quality Can Greatly Improve The Lifetime of The Heavy Duty Key Chain.