Chipping, framing or finish, titanium or brass, big or small, hammers come with one big built-in problem: not everyone knows how to use them safely – or drive nails in straight on the first try. For those folks willing to admit they are a novice for life when it comes to the art of hammering, this ingenious invention could re-frame the situation.

Basically, the Unihammer by Ji-youn Kim is designed to work something like this: a detachable steel cylinder attached to the hammer is removed and used to align a nail then hold it in position. The main handle and hitting element (likewise somewhat soft-faced) subsequently strike this removed piece rather than directly impacting the nail, making for a bigger target and greater finger protection.

This simple solution addresses the classic question of light versus heavy-duty hammers: do you want a framing hammer that can hit with a higher force, or trade power for something slightly less likely to miss the mark (and with a likewise lower risk of destroying your hand if or when it does)? The device does not make your swing more accurate, unfortunately, but it does make an inaccurate swing still work as well – the self-guiding forces traveling between hammer and surface via a more forgiving intermediary.

It might be a bit too easy for the die-hard do-it-yourself types, but not everyone wants to learn how hot the proverbial oven is by putting their hand on it – or, in this case, discover how much hitting your hand with a hammer hurts in a much more literal sense.