ALTTIMERY Stainless Steel Waterproof Storage Case Box Container EDC Gear Necklace Pendant Keychain Keyring Material: made of 316 stainless steel Diameter: Size S-1.1cm; Size M-1.3cm; Size L-1.4cm Length: Size S-4.8cm; Size M-5.5cm; Size L-6.9cm Can be used in most of situations such as skiing, diving, hiking etc Mirror Polishing craft, smooth surface, it's really a beautiful and luxury accessory tool