This carrying case is designed to securely store up to four pens and pencils. It features main slots to hold the pens and pencils in place, preventing movement that could cause damage. There's also an additional rear slot for storing extra items like pencil leads and erasers. Made from durable high-quality 3d-printed hard plastic, the case is built to withstand travel and daily use. Stainless steel M4 bolts with nylon locking nuts ensure the hinges and clamps remain tight over time, and reinforced latches add extra durability. The case was specifically created for the 600 pen, 800 retractable pencil, and 600 mechanical pencil. While it might fit other models, compatibility has not been tested. This case provides a practical solution for keeping your writing instruments organized and protected.