Product specifications: The square product has a total height of 3.27 inches and a body width of 1.77 inches; it features an upper nut with a diameter of 2.48 inches and a tail hole measuring at 1.10 inches. Hexagonal products have a total height of also measures at 3.03 inches, with diagonal distance at 1.99 inches, upper nut diameter at 2.48 inches, and tail hole at 1.18 inches.

Material composition: Crafted from excellent-quality 40CR alloy steel,this product achieves a hardness level up to 50HRC following appropriate heat treatment.

Product characteristics: Integrated formation ensures both high strength and excellent toughness,withstanding brittle fractures even under significant impact.

You will get: 1x ER-40 square chuck seat, 1x ER-40 hexagonal chuck seat, you will receive as shown in the pictures.

Note: Size error -/+ 0.039"-0.078", the actual size is subject to the actual object.