DRILLING TOOL

原文（中国語）

A drilling tool including a shank portion, a drill portion, and a collar. The shank portion includes a shank first end that is configured to be coupled to a power tool and a shank second end opposite the shank first end. The drill portion includes a drill first end, a drill second end, and a cutting head positioned at the drill second end. The collar is configured to dampen vibrations transferred between the shank portion and the drill portion during operation of the drilling tool. The collar includes a collar first end, a collar second end, and an apex. The collar first end is attached to the shank second end. The collar second end is attached to the drill first end. The apex defines a maximum outer dimension of the collar. The apex is positioned between the collar first end and the collar second end.