BANG TI Never Falling Off Titanium Heavy Duty Mini Carabiners Keychain Quick Release Hooks &gt;&gt; Super Safe & Quick Release: very tight spring clip, never need to worry about goods falling off, a wisdom and easier way with titanium quickdraw keychain. &gt;&gt; Super Durable and Heavy Duty: the highest load-bearing of the hook reaches 138 kg! Gr5 titanium alloy, high hardness, corrosion resistant, rust proof, lifetime using. &gt;&gt; High Strength but Light Weight: -- HOOK--Thickness 0.16", Hole Diameter 0.27, Weight 7.5g. -- KEY RING -- thickness 0.14, single layer reaches 0.07", Weight 3.4g. &gt;&gt; No more burden to your daily or outdoor backpack life. -- NOTE -- the spring clip opening is only 0.53", please use more finger tip to press instead of pulp if its narrow for your finger. And ensure the exact size of the hook too meet your demand, it might be too small as a main key hook to some users, recommend it as branch one if so. &gt;&gt; Very Shiny and Special Exquisite Polishing Finish, Luxury Appearance that you can see metallic luster shining at different angles.