This Wera 840/1 Z Hex Plus / Allen Key Screwdriver Bits Multipack use a standard 1/4" hexagon drive (for 1/4" socket head screwdrivers) and are from their tough Z range of screwdriver bits.

The multipacks come in a choice of either a 2 mm, 2.5 mm and 3 mm set or a 4 mm, 5 mm and 6 mm set to cover many of the common sizes, they are made with Wera's Hex-Plus technology that's designed to greatly reduce the risk of stripping screws or nuts by operating with a larger contact surface (driving from the flats of the hexagon instead of the corners). The size of driver is marked on the hex bits for quick and easy identification. We stock the Wera Kraftform Kompakt 812/1 Magnetic 1/4" Hexagon Bit Holding Screwdriver, which is compatible with these bits, as a separate item (Wera product code: 05051205001).

The sizes of Wera 840/1 Z Hex Plus / Allen Key Screwdriver Bits that can be commonly used on guitars are the following:

• 2 mm, Gotoh 510UB intonation screws
• 2.5 mm, Floyd Rose Original and Special, Schaller and Gotoh 1996T double locking tremolo saddle lock screws, Gotoh 510UB post height screws
• 3 mm, Floyd Rose Original and Special, Schaller and Gotoh 1996T double locking tremolo nut locking screws, string lock screws and post height adjustment screws
• 4 mm, Truss rods
• 5 mm, Truss rods

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