Item Type: Self Centering Lathe Chuck Material: Nodular Cast Iron Chuck Type: 3 Jaw Chuck Jaw: With two sets of jaws (one pair each for the front and the back). Package List 1 x Self Centering Lathe Chuck 3 x Jaw 3 x Screw 1 x Wrench 1The lathe chuck is made of nodular iron, which has high strength, high toughness, compression resistance and a long service life as well. 2Self centring design enables a centring accuracy less than or equal to 0.002in(0.05mm), and no adjustment is required after installation. 3The high accuracy design also ensures the accuracy during the clamping process, high working stability as well as high working efficiency. 4The matching screws make the lathe chuck highly adaptable and can be used with the same row of jaws as the chuck. 5The electric screwdriver chuck is suitable for clamping various parts, such as hanging shaft, disc, and equilateral triangle.