IRWIN INDUSTRIAL TOOLS Step Drill Bits

Cobalt / high-speed steel step drill bits designed to drill or enlarge holes in aluminium, brass, copper, PVC, steel or wood. Feature a single-flute cutting edge and a Speedpoint tip, and come in different shank sizes and bit lengths

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IRWIN INDUSTRIAL TOOLS -

High Speed Steel Step Drill Bit

StyleModelFinishNumber Of Hole SizesSizeSizes IncludedBit LengthShank SizeSize RangeStep ThicknessPrice (ex. VAT)
AUNIBIT 13Bright11.125"1.125"2 7/8"7/16"1 1/8"-€109.88
BUNIBIT 20Bright89/16" to 1"1", 11/16", 13/16", 15/16", 3/4", 5/8", 7/8", 9/16"3"7/16"9/16" to 1"1/8"€87.79
CUNIBIT 10Bright11/2"1/2"1 3/4"1/4"1/2"-€42.24
DUNIBIT 4Bright123/16" to 7/8"3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"3 1/4"-3/16" to 7/8"1/16"€98.16
EUNIBIT 11Bright17/8"7/8"2.593"3/8"7/8"-€56.31
FUNIBIT 2Bright63/16" to 1/2"3/16", 1/4", 5/16", 3/8", 7/16", 1/2"3 1/8"1/4"3/16" to 1/2"1/16"€42.72
GUNIBIT 1Bright131/8" to 1/2"1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"3 1/8"1/4"1/8" to 1/2"1/32"€42.72
HUNIBIT 3Bright91/4" to 3/4"1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"2 3/4"3/8"1/4" to 3/4"1/16"€76.97
I10239Steam Oxide27/8" to 1 1/8"7/8", 1-1/8"3 1/8"7/16"7/8" to 1 1/8"-€143.77
J15101Tin Coat131/8" to 1/2"1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"3 1/8"1/4"1/8" to 1/2"1/32"€72.38
K15102Tin Coat63/16" to 1/2"3/16", 1/4", 5/16", 3/8", 7/16", 1/2"-1/4"3/16" to 1/2"1/16"€68.57
L15104Tin Coat123/16" to 7/8"3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"3 1/4"3/8"3/16" to 7/8"1/16"€163.27
M15103Tin Coat91/4" to 3/4"1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"2 3/4"3/8"-1/16"€108.69
IRWIN INDUSTRIAL TOOLS -

Cobalt Step Drill Bit

StyleModelNumber Of Hole SizesBit LengthShank SizeSizeSizes IncludedSize RangeStep ThicknessMaterialPrice (ex. VAT)
A10239cb23 1/8"7/16"7/8" to 1 1/8"7/8", 1-1/8"7/8" to 1 1/8"-Cobalt€211.02
A10232cb63 1/8"1/4"3/16" to 1/2"3/16", 1/4", 5/16", 3/8", 7/16", 1/2"3/16" to 1/2"1/16"Cobalt€73.54
A10220cb83"7/16"9/16" to 1"1", 11/16", 13/16", 15/16", 3/4", 5/8", 7/8", 9/16"9/16" to 1"1/8"Cobalt€145.98
A10233cb92 3/4"3/8"1/4" to 3/4"1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"1/4" to 3/4"1/16"Cobalt€130.47
A10234cb123 1/4"3/8"3/16" to 7/8"3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"3/16" to 7/8"1/16"Cobalt€146.80
A10231cb133 1/8"1/4"1/8" to 1/2"1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"1/8" to 1/2"1/32"Cobalt€75.98
IRWIN INDUSTRIAL TOOLS -

Step Drill Bits

StyleModelNumber Of Hole SizesDecimal EquivalentLengthMaximum Hole SizeMinimum Hole SizeStep IncrementsMaterialFinishPrice (ex. VAT)
A10311ZR10.8751.812"7/8"7/8"5/32"High Speed SteelBlack Oxide€59.82
B11105ZR130.1969, 0.2953, 0.3937, 0.5118, 0.6299, 0.748, 0.8268, 0.9055, 1.0236, 1.1417, 1.2205, 1.2992, 1.3783"35 mm5 mm2 mmHigh Speed SteelBlack Oxide€160.10
C10502ZR170.125, 0.1563, 0.1875, 0.2188, 0.25, 0.2813, 0.3125, 0.3438, 0.375, 0.4063, 0.4375, 0.4688, 0.5, 0.5625, 0.625, 0.6875, 0.752 1/2", 3 3/16", 3 1/4"3/4"1/8"-High Speed SteelBlack Oxide€143.79
IRWIN INDUSTRIAL TOOLS -

Step Drill 10 Hole Sizes 1/4-1 3/8

ModelItemPrice (ex. VAT)
10235AD2VCD€211.23

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