Long Hex Key Wrench (2x20pcs)

It turns the socket head screws that hold together things people actually open up: control panels and enclosures, instrument housings, small motors and pumps, camera and optical mounts, hobby and model machinery, electronic assemblies, and the grub screws in slightly larger collars and couplings than the 1.5mm key handles.

Something worth understanding about hex sizes at this end, because it confuses almost everyone at some point. A key is measured across the flats of the hexagon, not across the corners. So a 2mm key measures 2mm from one flat to the flat opposite, and the distance across the corners is meaningfully greater than that. It is why a 2mm key looks smaller in the hand than the number suggests, and it is also why the next size up will feel as though it ought to fit when it does not. Trying to force it is how a good screw gets ruined by an owner who was almost right.

The other habit that pays at this size is to check the key itself before blaming the screw. A hex key wears at its tip, and it wears roundest exactly where it does the work. A worn key looks perfectly serviceable lying on a bench. The test is to look at the very end against a good one: if the corners have lost their edge, that key will now damage every fastener you put it into. On a hex key you can grind the worn end back square on a bench grinder, dipping it in water often so the heat never colours the steel, which exposes fresh full size hexagon behind the wear. On a 2mm key there is not much length to give away, so most people simply replace it, which is what these singles are for.

The long pattern buys reach into recessed panels and down between components, which at this size is usually the whole difference between doing the job and dismantling something first.

Chrome vanadium, forged, hardened and tempered.

Buyers are electronics and instrument technicians, appliance and equipment repairers, machine and toolroom shops, and hardware shops carrying loose sizes.

The piece count printed in the catalogue name is Harden's carton figure, not the quantity supplied. What you are buying is one 2mm key. Ask us on 94 77 111 8880 and we will send it out, island-wide, with trade prices for shops.