These cordless shear bolt wrenches are made by Makita. They are used to drive tension control bolts to ensure the correct tension is achieved and overtightening does not occur. They are powered by two 18V batteries. Tool batteries can often be used with tools of the same brand, battery series, and voltage. Voltage describes the level of power the battery provides. Amp-hours (Ah) describes the amount of power the battery holds (its capacity), which determines how long a fully charged battery can perform before needing a recharge. The higher the Ah rating of the battery, the greater its storage capacity. As voltage and Ah ratings increase, so does the weight and bulk of the battery and the tool it powers.
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