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Prestacycle's Pro Presta head features a patented auto-lock mechanism that securely attaches to the Presta valve without pulling or twisting. It seals without clamping the valve and has easy-grip sides for pressing the red release button ensuring an instant no-loss disconnect for accurate tire pressure. Designed for professional use it includes a durable steel head and a 90-degree angle for easy access. Compatible with all Prestaflator tools (except ECO) it upgrades most premium floor pumps eliminating the need for unsafe clamping and thread-on heads.