Feature(may vary by option.)

●Reduce the processing cost per hole. Search B0B5519WMC
●High Quality Material. High Speed Steel Cobalt M35 Cobalt Steel Best Material.
●High Efficiency In Drilling Metals, and Stainless Steel.
●Drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel
●The imperial size 1/4" is for reference,1/4" equals to 6.35mm. Real size is 6.44mm, rounding up 6.5mm.Please confirm the size before ordering

[8.0mm(5 & 16 )]

[3.2mm(1 & 8 )]

[4.8mm(3 & 16 )]

[6.5mm(1 & 4 )]

[12.7mm(1 & 2 )]

[5.5mm(7 & 32 )]

[9.5mm(3 & 8 )]

[4.0mm(5 & 32 )]

Description

Specially designed for drilling in hard steel, thick web helix delivers fast material removal combined with increased durability for maximum efficiency and performance.
Each bit is manufactured to exacting specifications and features a split point that starts on contact with no walking or skating, eliminating the need for a center punch.

Product Details:
Diameter: 1/4 inch
Flute length: 2.48 inch
Total length: 3.97 inch
Material: 5% Cobalt
Package: Plastic box

Drilling Reference:
Material:
Automobile leaf spring steel plate
Drilling Speed(r/min): 450
Feed rate(mm/r): 4
Drilling depth: 10mm
Holes: 6.