TOTAL-CN TOOLS CO., LTD.

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HSS Step Drills- Straight Flute                  HSS Step Drills- Spiral Flute

METRIC SYSTEM STEP DRILL

HOLE SIZE STEP SHANK DIA.
4.0-12.0 5 step 6/6.5
4.0-12.0 9 step 6/6.5
4.0-20.0 9 step 8
4.0-22.0 10 step 8
4.0-30.0 14 step 10
4.0-39.0 14 step 10
5.0-35.0 13 step 13
6.0-18.0 7 step 10
6.0-20.0 8 step 10
6.0-24.0 10 step 10
6.0-32.0 8 step 10
14.0-24.0 6 step 13
14.0-25.0 7 step 13
20.0-34.0 8 step 13
10.0-20.0 11 step 10
20.0-30.0 11 step 13
5.0-28.3 10 step 10
6.0-30.0 13 step 10
6.0-38.0 12 step 10
6.0-26.75 7 step 10
6.0-39.0 12 step 10
6.0-37.0 12 step 10
6.0-32.0 9 step 10
6.0-40.0 16 step 13
4.0-32.0 15 step 10

INCH SYSTEM STEP DRILL

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HOLE SIZE STEP SHANK DIA.
3/16" - 1/2" 6 step 1/4"
1/8" - 1/2" 13 step 1/4"
1/4" - 3/4" 9 step 3/8"
3/16" - 7/8" 12 step 3/8"
7/16" - 1 1/8" 12 step 3/8"
1/4" - 1 1/2" 11 step 1/2"
1/2" - 1" 9 step 3/8"
9/16" - 1" 8 step 3/8"
3/4" - 1 3/8" 11 step 1/2"
13/16" - 1 3/8" 10 step 1/2"

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