PLATINUMEDGE Step Drill Bits Set, 5 Pieces SAE, High Speed Steel Step Bits with 50 Total Step Sizes, Double Flute Cutting Blades, Nitride Black Coating and Polished

【PREMIUM STEP BIT】Each drill is constructed of industry grade 4241 HSS with nitride black coating and polished. 【DOUBLE-FLUTE DESIGN】 Double cutting blade design guarantees a faster and smoother cutting, allowing particles to escape easily. 【STEP BITS WITH MULTIPLE DRILL SIZES】5PCS-50sizes - Bit #1 (6 Steps): 3/16"-1/2"; Bit #2 (9 Steps): 1/4"-3/4".Bit #3 (13 Steps): 1/8"- 1/2". Bit #4 (12 Steps):3/16"- 7/8". Bit #5 (10 Steps):1/4" - 1-3/8". Just 5 pieces to meet all your needs. 【STURDY STORAGE BOX】Stored in a sturdy plastic box with a clear lid that you can find the drill at a glance. 【WIDLY APPLICATION】strength to punch and drill clean holes in materials like plastic, aluminum, wood, copper, and other types of sheet metal.