product description:
RUIMI Titanium Step Drill Bit, High Speed Steel HSS Quick Change 1/4" Shank Total 31 Sizes 3-Piece Set Tool for Carbon Steel, Sheet Iron, Insulation Boards, PVC Boards, Planks, and Wood Features: === Drill 19 hole sizes.
=== This compact set replaces 31 individual drill bits.
=== Titanium nitride coating for cooler running.
=== Quick-change 1/4" hex shank.
=== High Speed Steel for long service life.
=== They also help to enlarge existing holes.
=== The two flute design tips made the penetration faster without chipping.
=== Application: suitable for below 25 hardness of the work piece, such as carbon steel, sheet iron, insulation boards, PVC boards, planks, and wood thickness below 5MM.
Specifications:Material: High speed steel
Sizes of the 3 Step Drill Bits:
15 Step bits from 4-32mm
4 6 8 10 12 14 16 18 20 22 24 26 28 30 32mm
9 Step bits from 4-20mm
4 6 8 10 12 14 16 18 20mm
10 Step bits from 4-12mm
4 5 6 7 8 9 10 11 12mm
Package included:3 x Drill Bit
RUIMI Warranty Description:If this item was damaged within 30 days,Please send E-mail to us (add items damaged photo)
Plan A :We will
return all money to you
Plan B:we will resend new one for you,
meanwhile we pay the return shipping fee
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