The proprietary design of this custom Ledge Lock does not require any adhesive or alteration to the body of the MacBook for attachment. The slim design of this highly secure lock slot adapter seamlessly integrates with the MacBook's minimalist appeal. It is ultra-lightweight, weighing less than 0.1lb, which adds minimal bulk, allowing the MacBook to fit easily in a sleeve or bag. MacBook Ledge Includes: - Ledge Lock Slot Adapter - Installation Hardware Kit