5-Piece HSS Step Drill Bit, Black and Gold (Sizes #1 - #5) 6" HSS Aircraft Fractional Drills The length between the chucking

The length between the chucking slot on the shank to the end of the shank is a standard 3/8"

it runs up to 30% faster than standard M2 high speed steel

Black oxide surface resists abrasion and improves chip flow

and titanium

they can be used on softer materials such as wood

5-Piece HSS Step Drill Bit, Black and Gold (Sizes #1 - #5) 6" HSS Aircraft Fractional Drills The length between the chuckingDescription Black and gold surface treated A single bit can be used for drilling a wide range of hole sizes in metal, plastic, and wood. The exclusive single radial concave flute creates perfectly round holes in metal, plastic, wood, and other thin materials without the need for center punching. Constructed of industrial grade high speed molybdenum steel, heat treated and temperature for long life Automatically deburrs the top side of the hole. Ideal