Gunpla Cobalt Drill Bits 4mm 10-Pieces, M35 HSS Metric Straight Shank Jobber Drill Bit Set with Plastic Case for Hardened Stainless Steel, Metal, Aluminium, Tile, Wood, Plastic and Cast Iron…

I bought this pack of 3mm drill bits to do some alterations to my cast iron wood burner to improve the screenwash. As this involved drilling about 30 holes in cast iron I expected to break several bits in the process... As it turned out - I only needed ONE of these bits to complete the job, and that bit is still sharp. Amazing quality and value for money.

I’ve bought loads of these drill bits in different diameters. Great value for money nd so helpful to have 10 of the same size as small drill bits do have a tendency to beak easily. Very affordable.

Decent drill bits with a little flex.Good value.

Great delivery time, very pleased with my purchase, thank you.

These cobalt drill bits are worth at least ten of your standard hss bits. They ease themselves through steel, stainless, cast iron, wrought iron etc like a knife through butter. I've even drilled wood with them which they handle well although your standard hss bits are quicker and more accurate for that application. For metals these are the business. Now I know how good they are, I will buy more sizes to expand my kit.

Good sturdy drill bits. Good price

Don't tend to do reviews , but these are very good

Bought as a less brittle alternative to a solid carbide bit for drilling a stainless steel coupling nut. Will not work.

Die "Kleinen" 3mm werden oft gebraucht und von daher war der 10er Pack mit praktischer Entnahme und der Möglichkeit zum an die Wand hängen eine gute Entscheidung.

Très bon foret, résiste bien à l'usure : plus de 400 trous dans des tubes d'acier de 4 mm épaisseur sans que le foret soit abîméBon affutage de basepas besoin de pointer

Las he usado porque las que tenía ya les costaba y la verdad que funcionan muy bien

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