McMaster 2933A65 1/2" Diameter Reduced-Shank Drill Bit Black-Oxide High-Speed Steel, 59/64" Size 1989483 They are reinforced with two

They are reinforced with two layers of fiberglass mesh

Lockout Device Maximum Temperature 248 Degrees F Horizontal Arm Material Fiberglass Reinforced Nylon Resistance Properties Chemical Resistant

Tip Size 7/8 in

Primary Material Application Metal

Bulb Designation T8-LED

McMaster 2933A65 1/2" Diameter Reduced-Shank Drill Bit Black-Oxide High-Speed Steel, 59/64" Size 1989483 They are reinforced with twoCut large holes with drill presses and portable drills that have a standard size chuck. The shank on these bits has a smaller diameter than the cutting tip. High speed steel is good for general purpose drilling in most metals. Also known as Silver and Deming bits. Jobbers' LengthThese bits have the balance of rigidity and length needed for most applications. Black OxideThe dark finish increases wear resistance and reduces friction to improve chip