Long Hex Key Wrench (2.5x20pcs)

It sits in the gap between the very small keys used on grub screws and the 3mm that starts appearing on general machinery, and it turns up in door and window hardware, in handles and locksets, on office furniture and shopfitting, in small hinges and catches, on electrical accessories and enclosures, and across a good deal of imported equipment where the designer simply chose it.

Because it is neither a common size nor a rare one, it is the size most likely to be missing from the drawer when it is wanted. Sets contain it, but sets get raided. Somebody borrows the 2.5mm to adjust a door closer and it never comes back. That is precisely the purchase these single keys exist to serve, and buying the one that has gone missing is a far better answer than buying nine keys you already own to get at the tenth.

There is a habit worth building at this size, and it is about how the key is held rather than how hard it is pulled. Push the key fully into the recess before applying any turn. It sounds obvious and it is the commonest reason small socket heads round out. A key that is seated three quarters of the way down is bearing on three quarters of the available depth, so the pressure on the metal goes up by a third for the same effort, concentrated at the mouth of the socket where the recess is weakest. Seat it, then turn it.

Cleanliness is the other half of the same point. A socket head on a door or window fitting collects paint, render dust and polish. Any of that packed into the bottom of the recess stops the key going home, and you will not feel the difference in your hand until the corners have already gone.

The steel is forged chrome vanadium, hardened and tempered so the six corners keep their shape rather than rolling over.

It sells to joiners, shopfitters and aluminium fabricators, door and window installers, electricians, furniture and office equipment fitters, and hardware shops that stock singles because customers keep coming in for them.

Read past the piece count in the catalogue title, which is Harden's carton quantity. This is one 2.5mm key. Message 94 77 111 8880 and we will deliver it anywhere in the island.