Key Size Requirements: KeySmart accommodates up to 8 flat standard-sized house keys (max of 80mm long and 2mm thick each) and can be expanded to hold up to 14 keys using the included expansion kit Easy to assemble, no tools required, holds all of your existing keys - attach your larger car keys or fob remotes with the included Loop Piece attachment Say goodbye to bulky keyrings, annoying thigh pokes, and key jingle for good - organize that mess and free up your pockets with a KeySmart Key Organizer! KeySmart's ultra light, compact body is built with aircraft aluminum frames and stainless steel hardware - the patented S-shaped design makes carrying your keys delightful Add the Perfect KeySmart Accessories: Create a reliable utility organizer/keyholder with a wide range of our KeySmart mini tools to choose from, such as the; Quick Release Keychain, Bottle Opener, Pocket Clip, MultiTool, NanoPliers, and many more.