When pouring concrete it's important to remove as much air as possible from the concrete, with for example this kind of tool. There's no cord to restrict you, just make sure you've
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Makita DVR350Z 18V Li-Ion LXT Vibrating Poker - Batteries and Charger Not Included
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Makita DVR350Z 18V LXT Vibrating Poker - Body
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Makita DVR350Z 18v LXT Cordless Vibrating Poker Body Only