These 7-piece. Forstner Bit Sets have hexagonal shanks for a no-slip grip and includes: 1/4-Inch, 3/8-Inch, 1/2-Inch, 5/8-Inch, 3/4-Inch, 7/8-Inch and 1-Inch diameter. These bits measure approximately 3-3/4-Inch long and include a see-thru protective plastic case.