toolant Four Spiral Flute Cobalt Step Drill Bit(Pro Max), 4-22mm Impact Ready Four Spiral Flutes Unibit Step Bit, 1/4" Hex Shank Unibit for Metal, Stainless Steel, Aluminum, Wood, Plastic

It was quite good for the short time it lasted The hex shank broke off on the light duty work enlarging a hole from 6 to 8 mm on a light fitting update the seller has told me he will replace to step drill

Excellent piece of kit sharp and clears swarf down the four flutes

Easily drilled into tough materials, including stainless, leaving a very clean hole. No sign of blunting after drilling about 30 20mm holes, but I haven't used it for long enough to know how well it will keep its sharpness.

BRILLIANT, EVEN A YEAR-OLD WORKS WELL USED AT LEAST 3 TIMES LAST WEEK AND DRILLS AS GOOD AS THE DAY I GOT IT, PLASTICS, WOOD, METAL

Exceptional tool

Used few times and it broke apart

Arrived very quickly. Not overly priced and looks good quality. Unfortunately I haven’t had a chance to use it yet!! I doubt it will disappoint

Super handy bit - not cheap but does the job effortlessly

Macht was es muss, löcher 👍🏻

These relatively inexpensive bits outperform very high dollar carbide machinist bits, and other much more expensive cobalt bits. The cut so fast that the material barely has any chance to get hot which makes them last forever. I've been using them not for several months and I am very sincerely impressed. It's really hard to trust sellers these days. I think I paid 60 bucks to try them in my body shop just as a chance they might work on the lighter sheet metal and they performed so well and lasted so long I have started using them in my machine shop. They are suitable for cutting harder than mild steel, alloys and stainless with no issue whatsoever. I cannot speak highly enough of how surprised and utterly impressed I am with the performance. The most surprising part is the cost! They are the cheapest bits I own and they are also the best drill bits I own! I'm putting together a list to start replacing my professional machinist quality drill bits with these as they go bad and dull. They cost less than sharpening my bits and I have yet to dull any of these as of yet. Very surprised, impressed, and happy with them! I wish more things were like this. I'm happy I took a chance and bought these taking a low risk chance that had really taught me a wonderful lesson.

Decent cobalt bit cut through stainless easily. Little and light use so far but it showed no signs of dulling immediately like a cheap one would.

Drills straight, might pull itself into the material.

Se ha producido una vibración en el corte y en mango ha partido, después de 8 ó 10 agujeros de poco diámetro Actualización : puesto en contacto con el vendedor, me han devuelto el importe, después de 3 meses de la compra