6" Full-Round Swiss No4 Cut Impressioning File

The Impressioning File The Professionals Use

(Limited stock - when they're gone, they're gone)

If you’re impressioning locks properly – not pretending, not faffing about, but actually producing working keys from scratch – you need the right file. And there’s only one the serious lads reach for: the 6" Full-Round Swiss No.4 Cut Impressioning File.

This isn’t some cheapo hardware-store toy, it's the real deal for one of the most extraordinary lock picking techniques out there. You start with a blank key and a lock, and you end up with a working key and the lock open.

The Swiss No 4 cut gives you that razor-fine, perfectly consistent surface that takes impressions like wet plaster, revealing every strike, slip, and mark with absolute clarity. But it’s not too fine either – that full-round profile and No.4 cut keep it abrasive enough to shape and fill the key as you work, so you aren’t standing there all night filing away like a fool.

The geometry is bang on: full-round for controlled removal, Swiss precision for repeatable accuracy, and a 6" body that gives you proper leverage without killing your hand. Every top impressioner I know uses one of these. Not because it’s trendy, but because it works, it lasts, and it wins. Simple as that.

If you want clean marks, faster keys, fewer misreads, and a file that’ll actually make you better at impressioning, stop messing around. Get the file the experts use. Use the tool that does the job.

Some people say the Pippin file is good for impressioning - perhaps, if you're advanced, but the teardrop shape of the Pippin file means you have to maintain a perfect movement, whereas a round file is guided by the groove you've already cut. Watch Jos Weyers (World Impressioning Champion) impression a lock, it's always a full-round No 4 Swiss cut. Oli Diederichsen, same again - and I've seen the pair of them live, impression locks, out of the box, handed to them by a member of the audience in under a minute. Don't make a tricky job more difficult, stick with what works. This is that file.