flintronic Step Drill Bit 5mm-35mm, with 1 Automatic Center Punch& 1 Twist Drill Bit, HSS Titanium Coated Double Slot Cone Cutting Drill

I got it today and used the centre punch and drill bit, which fitted in my smaller cordless drill...the step drill bit however did not fit my smaller cordless drill so I had to use my bigger cordless drill.. Be careful that you have a larger drill or else the step drill bit will not fit in .Apart from that it bored through my galvanised steel incinerator bin with no issuses, all three bits worked fine..not sure when i will use them again tho so cant vouch for durability over time

there was no center punch delivered in fact the packaging didn't allow for one

Fine product

brilliant drill bit. dont try using meral drills for tin plate, this is what you need. excellent

Any hole any size to a degree

Used only once to make 20mm whole in tin electrical conduit and got all blunt. Good only for plastic.

Safer to use than a drill bit, especially cutting through thin brass sheet. Saved me a lot of filing too.

I suppose you get what you pay for. Should have read the reviews first. Whilst this seems decent-ish quality, its obviously a cheap product from China and the diameter of the bit doesn't fit in a standard drill. I only wanted it to drill a hole in a water butt so couldn't justify the cost of branded step drill bits, hence buying this. The drill bit is useless unless I buy a heavier duty drill.Still, the centre punch will come in handy I suppose.