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Box Spanner

The spanner is made of tubing with flats arranged at each end. Holes through the tubing are designed to take a tommy bar set at right angles to the tube, and this is used to apply purchase to the spanner head. One of the most common types is the spark plug spanner, which may be designed to take a tommy bar, or it may incorporate a swivel handle which can be used to apply the leverage.

Available in various sizes such as :

24×27 30×32 30×33 27×32 21×41 21×38
24×27 30×32 30×33 27×32 21×41 21×38