High Quality: Three-Jaw Chuck Jaw Boring Ring is made of ultra-high strength 42CrMo alloy steel with high strength and high toughness, combined with high temperature quenching and tempering, giving it high hardness (45-50 degrees), extending service life and reducing maintenance. User-Friendly Design: It does not require discs or pads to hold the jaws, allowing through-hole machining of the jaws. Adjustable According To Size: Both the outer clamp and the inner clamp can be used. The hydraulic pressure claw can be adjusted according to the required size, which is convenient and quick to operate, saving time and effort. High Roundness Accuracy: Improve the accuracy of roundness, center of the circle, cylinder degree, etc. The oil pressure raw claw does not produce bell mouth shape and centrifugal vibration, and has good control effect on the oil pressure claw forming ring. If you have any questions about the use of the product, please feel free to contact us！, Manufacturer: AQCDPJYU