The Hall anchor, also known as the mountain anchor, is a rodless anchor with an anchor that can rotate freely and anchor to a certain inclination. The anchor head and the anchor claw are a one-piece casting. The anchor is passed through the anchor head, and is locked by an anchor dry shaft pin and two anchor head cross pins, so that the anchor head and the anchor claw can rotate 45° forward and backward with the anchor shaft pin as the axis. When the anchor is lying flat with any side of the anchoring claw contacting the bottom of the water, the resistance generated by the friction of the anchor head flange rubbing the subsoil under the pulling of the anchor chain forces the anchor claw pear into the subsoil to generate a grip force. Its grip is about 2.5 to 4.0 times the anchor weight. The Sbeck anchor is an improved version of the Hall anchor with the center of the anchor head located below the centerline of the pin. The structural feature is that the anchor crown is provided with an anchor plate and a reinforcing rib. Therefore, the claw of the anchor is extremely easy to turn to the ground, and the stability is better, and when the anchor is anchored, the anchor claw is naturally facing upward, and is turned over in contact with the hull plate without damaging the hull plate.