Allen / Hex Key Set (9 piece)

The nine metric sizes run from 1.5mm to 10mm, enough for the small fixings on a tech's bench and around the backline. The ball end lets you turn a bolt when the key cannot sit square to it, and the plain short arm gives more leverage for breaking a tight bolt loose.

These are metric keys. Some guitar truss rods need an imperial size: Fender, for example, fits 3/16 inch (about 4.8mm) hex nuts to a number of models, which falls between the 4mm and 5mm keys here. Check the size your instrument needs before using a near-fit key, as it can round off the socket.

Specifications

• Pieces: 9 hex keys
• Sizes (metric): 1.5, 2, 2.5, 3, 4, 5, 6, 8 and 10mm
• Ends: ball end on the long arm, plain hex on the short arm
• Finish: colour-coded by size
• Storage: holder with carry hole