Step Drill Bit Set 3-12mm 4-12mm 4-20mm HSS 4241 Titanium Coated Straight Flutes Hex Shank for Metal Wood Plastic 66x45x0.3mm Size(Approx): 49 x 19 x

Size(Approx): 49 x 19 x 9

a support frame and a protective sleeve should be installed

Add cutting fluid to protect the cutting edge and make the cutting smoother when working

With 4 Thread Hole: M3

40Pcs Cage Nuts

Step Drill Bit Set 3-12mm 4-12mm 4-20mm HSS 4241 Titanium Coated Straight Flutes Hex Shank for Metal Wood Plastic 66x45x0.3mm Size(Approx): 49 x 19 xFeatures: Laser marking makes the size more clear; High speed steel for longer service life; Used on electric drills and drill presses; Double cutting edges design enables a faster and smoother cutting; Hexagonal shank prevents slip in electric drills and presses chuck; X type openings design to facilitate the removal of cutting waste when drilling; The sharpness and titanium coating ensure easily cut through most metal, aluminum, plastic, wood and