FLAT DRILL

摘要

A flat drill having a handle, and a flat blade formed in the front portion of the handle part. A front portion of the flat blade extends inwardly from the two sides, forming first and second shoulder. The two shoulders continuing to extend and taper inward and upward, forming two tapered sections respectively, a first tapered section and a second tapered section, and having a pointed top. A first groove is formed on a blade part of the first shoulder toward the inside of the flat blade part. The inner edge of the first groove is inclined downward towards outside direction of the first shoulder, forming an angle of greater than 0 degree with respect to a horizontal line of the flat drill.

主权项

1. A flat drill characterized by comprising a handle part, and a flat blade part which is formed in a front part of the handle part, the front part of the flat blade part extending inward respectively from two side parts, forming two shoulders: a first shoulder and a second shoulder; the two shoulders continuing to extend and taper inward and upward, forming two tapered parts respectively: a first tapered part and a second tapered part, and forming one pointed top at the top part; a first groove being formed on a blade part of the first shoulder toward the inside of the flat blade part, and an inner edge of the first groove inclining downward toward outside direction of the first shoulder, forming an angle of greater than 0 degree with respect to the horizontal line of the flat drill.