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Standard Metric Step Drills

An essential tool for every tool room. One tool does two jobs in a single pass. They can be sharpened repeatedly and are easily modified for any specital length-of-step.

For Drilling and Counterboring Cap Screw Clearance Holes

Prod. #	MinorDiameter	Screw Size mm	MajorDiameter	OverallLength	Flute Length	StepLength	Price
371M-3	.146	3.00	1/4	4	2 3/4	3/8	$13.95
371M-4	.189	4.00	5/16	4 1/2	3 3/15	1/2	$17.89
371M-5	.228	5.00	3/8	5	3 5/8	5/8	$20.25
371M-6	.268	6.00	7/16	5 1/2	4 1/16	5/8	$22.25
371M-8	.346	8.00	9/16	5 5/8	4 13/16	3/4	$28.25
371M-10	.425	10.00	11/16	7 5/8	5 5/8	7/8	$43.35
371M-12	.504	12.00	3/4	7 5/8	5 5/8	1	$52.39
371M-14	.581	14.00	7/8	5 1/2	3 1/2	1	$70.91
371M-16	.659	16.00	1	6	4	1	$97.25