| 摘要 |
PROBLEM TO BE SOLVED: To provide a wall anchor used for a crushable material comprising a generally cylindrical body having a flanged end part, a center part, and a drill end tip. SOLUTION: This drill end part comprises a generally flat blade including a first portion and a second portion. The first portion comprises a first inclined cut blade and a first transverse cut blade, and the second portion comprises a second inclined cut blade and a second transverse cut blade. These portions are formed on a common line, and offset from each other along a plane passing the diameter of the cylindrical body, to form the tip. The center portion and the flange end part have a combined axial length, and the drill end part has an axial length shorter than the axial length of the center portion and the flange end part. |
