You do not need to use a chuck key, pin, or wrench. Experience only a brief interruption in your work. The handpiece body features a built-in lever mechanism that allows for quick and smooth opening. This item offers low vibration and slow heat buildup during operation. Suitable for grinding, drilling, milling, and other compatible applications. Made from high-quality metal material with a smooth surface. Compact design for comfortable and convenient use. Commonly used in jewelry and craft processing. Color: Silver + Black Material: Metal Length: 142 cm Collet: 2.35 mm Package Contents: 1 x Flex Shaft Machine Only the above package content is included; other items are not part of the package. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.