Master Mechanic, 7/16" x 5-1/2", 4341, High Speed Steel Drill Bit, 118 Point, Bright Silver Finish, Jobber Length, 3/8" Shank, Features 2 Cutting Edges & Polished Flutes, Recommended For Drilling Wood, Plastic, Wallboard & Plywood & For Moderate Use In Soft Metal, Brass, Bronze, Sheet Metal & Aluminum, Carded.