General description The 2-piece 6.35mm (1/4 inch) hex keyless chuck adapter is designed for quick change and versatility, making it ideal for electric percussion drills. This adapter allows for the transformation of percussion drills and quick-change drills, providing a secure grip for a wide variety of drill bits. Technical specifications Hexagonal shank size: 6.35mm (1/4 inch) Chuck range: 0.3mm to 6.5mm Color: Silver and black Usage This adapter is perfect for quick changes in drilling tasks, allowing for efficient work with electric percussion drills and motors. It is designed to hold drill bits securely in place, ensuring stability during use. Note: The product cannot be used in a counterclockwise direction. Other information Package includes: 1 silver keyless chuck and 1 black keyless chuck