Super lightweight storage for essential tools, hidden in the steerer tube. Installation is quick and easy without having to touch the helm. Attention: - Stash RCX fits forks with or without an open end at the bottom of the steerer tube. - The inner diameter of the fork steerer tube must be round and measured between 23.5 mm and 27 mm. Warning: -May not work with Rockshox forks and Fox E-MTB fork steerer tube due to internal tapered design. Check with your fork manufacturer to verify compatibility before purchasing. The Stash RCX version is designed for forks without an opening at the bottom of the steerer tube. Utilizing a compression plug to replace the star nut, the Stash RCX fits forks with a steerer tube inner diameter from 23.5mm to 27mm. - Compact multi-tool stored in the steerer tube. Always ready for the unexpected. - 8-piece multi-tool: 2, 2.5, 3, 4, 5, 6, T25, open-end wrench/spoke: 0, 1, 2, 3 with valve core removal function. - Installation is quick and easy without having to touch the helm. - System weight 110g (with multi-tool). - Suitable for bikes with threadless headsets and fork steerer tubes with an inner diameter of 23.5 to 27 mm.