?High Quality Material??Manufactured From High-Speed Steel And Coated In Gold Oxide, Jobber Drill Bits Are Able To Withstand Friction And Heat So You Can Drill Continuously Without The Bits Heating Up | | ?135-Degree Split Point Twist Design??The Split Point Design Increases The Cutting Edge On The Tip, And The Blunter 135 Angle Means More Of The Cutting Edge Touches The Surface Sooner. The Grooves On The Sides Of The Bits Twisted Shanks Will Bring Metal Shavings Up And Out Of The Hole As You Drill | | ?Product Feature?: Twist Drills Are Indicated In Sizes. Assortment Comes With A Combined 29 Sizes Added?1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8"?25/64"?13/32"?27/64"?7/16"?29/64"?15/32"?31/64"?1/2" | | ?Multiple Application??Perfectly Suitable For Drilling Wood, Plastic, And Some Lightweight Metal Materials. Drill Bit Holder With Size Index For Easy Induction A.