Audel professional HSS step drill UniBit, diameter 5-35 mm titanium, 2 cutting edges - conical drill bit - conical drill silver

Bought to use on plastic to make an existing hole bigger it worked a treat it was so easy. I could not use my cordless drill as the chuck was too small but it fit my standard electric drill with no problem. Handy little tool that I will keep on my tool box for other jobs.

Usually use G&J Hall cone cutters which are outstanding, but very expensive. For the price this is very good quality, and works well. It doesn't open up as quick or as cleanly, compared to the hall ones but im happy with it. Rusts quickly if you get it wet, so keep it dry

For the price this is bloody fantastic. So far I have used it to enlarge a hole in a plastic dashboard panel to 27mm and also to enlarge the mounting holes for a safe from 8 to 12mm. Plastic capable - Check 3mm steel panel capable - Check The cutter shows no sign of wear after either task. The hole it made was nice and clean in the plastic, metal may need some deburring afterwards as the cutter can leave some swarf attached to the workpiece. There is not a lot of tolerance between the steps so this tool will not be any use for thick materials. Anything more than 3mm will require drilling from both sides to obtain an even aperture or you'll end up with a cone shaped hole. You’ll need at least a 1/2” chuck on your drill to fit this bad boy in, the shank is chunky. Take the job nice and slow to avoid snagging or over drilling the hole too big. Remember, you can’t drill a bit back on.

I would not use this for precision work but it opens holes easily in suitable materials. Chunky enough that I have even used it by hand for a careful opening. Heavy and well made.

I bought this to fit outlets in a thin plastic enclosure. It cut the holes with ease but as the steps between sizes are so shallow I couldn't even get a clean parallel hole all the way through. a waste of Money.

I used this to drill a large hole in some fiberglass and some aluminum. Obviously, it was not a tough challenge and did the job effortlessly. looks well made and would certainly handle tougher jobs.

It’s unfortunate that there’s no option for a negative one-star rating. I can’t stress enough how bad this product is. It failed to make a proper 32cm hole in 3mm thick aluminum. The edges and sharpness wore out within just five minutes. It only cost 11 euros, so I won’t bother returning it, but it’s been my worst purchase in quite some time.

Needed to drill 32 mm holes in sheet aluminium, prices from other suppliers were more than double this one, ranging up to around £50. Checked out the diameters of each hole size, they varied from 0.1 mm to 0.13 mm under size but when the amount of vibration that a drill of this type produces is taken into account the end result is quite close to the specified size. I checked the state of the cutting edges before using it, in pictures 1-3 the V shape shows slight burrs and knocks due to the grinding process and presumably rough handling before packing. I was able to clean these up quite easily with a few strokes of diamond stone, the cleaned up results shown in pics 3-6. These were taken after using the drill. At this price it is not reasonable to expect the finished quality that you would get with one costing around £50. At this price I was satisfied with the end results, and for low volume usage this would be ideal with a good range of sizes available. In use I did not make a pilot hole, just center punched it, went through easily although the metal did warm up a bit, just remember to stop at the correct step! No lubrication was used this time, next time will try it with some WD40 and see what difference there is. For DIY usage this is good value and I give it 4 stars.

Der Kegelbohrer ist solide gebaut und bietet ausreichend Führung nach dem vorbohren. Nach der Vorbohrung mit einem 5mm Holzbohrer konnte ich prima die Löcher mit dem Kegel erweitern. Trotz Handbohrmaschine (welche für einen solchen Kegelbohrer nur bedingt zu empfehlen ist) gab es kaum Verkantungen. Nur einmal gab es eine kleinere Absplitterung, aber dies war auch durch meine manchmal leicht unruhige Hand zu erklären. Super Preis und super Produkt. Es macht Spaß mit dem Bohrer zu arbeiten.

herramienta duradera con un acero excelente

Muy buen producto!

Utilisée sur couvercle container poubelle en PVC, très pratique. Beau trou rond réalisé

punta trapano varie misure da 0,5 a 35se non erro, resistente materiale buono visto il prezzo, precisa e ottima per piccoli lavori domenstici arrivata in un giorno con prime nella sua confezione di plastica quindi ben protetta prezzo buono quindi non aspettiamoci nulla di super professionale ma funzionante per casa