HEX Drivers

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What They Are and What They Are Used For:

These are like screwdrivers but with hex heads (like allen/hex keys).

Small model helis just about exclusively use hex head screws.  You will forever be undoing and doing up these small screws.  A good hex driver will change this from an exercise in frustration to a pleasure, and decrease the chance of damaging either the screws or the driver.

For a HK 450 (and most 450 size helis), just about all the screws are 1.5mm.  The other size needed is 2mm for the blade grip bolts.  If you are on a real budget you could get away with getting a good 1.5mm size only, but a set of sizes is recommended.

IMPORTANT – do not think you can get away with just using allen keys (ie the L-shaped hex keys).  These are commonly of poor quality.  Also lots of the screws on a heli go into plastic – so it is important that you don’t over tighten them.  A hex driver will give much better ‘feel’ to how tight a screw is – so you are less likely to strip the thread.

Try to make sure the ones you get are of the hardest steel possible.  This way they won’t wear over time and are less likely to slip and strip out the hex heads.

How to use them:

Just like a screw driver