Precise fully hardened chrome vanadium steel for driving socket screws.

Why not buy a coloured canvas zipper bag to keep them handy?

This key fits the Unitrack Rope Clamps.

If you are working on stage the two sizes you really ought to have in your toolbag, or your handbag, are the 1/4” and the 8 mm which will fit the popular key clamp tube fittings for size 6 and size 8
scaffolding respectively.