I bought this rock drill so I wouldn't have to take my good Dewalt into the caves and possibly ruin it. I use this device to drill holes in limestone 16-18 inches deep and 1/2 inch diameter to expand caves. Most of the time I have to tow the seed drill through liquid manure and narrow passages. The drill works phenomenally and exceeds all my expectations. Get 3-5 holes drilled in the battery. Now he's beaten to snot and still works. My only complaints are the lack of spare batteries and the 2 long charge times that came with it (up to 4 hours). Otherwise it's a great drill from ETA: Found an exact match at Revain which is advertised as a 20V battery but is actually a 21V lithium battery; Tools, Long Life Battery, ZIVNIA Cordless Blower, Support Lithium Ion Battery (RC-3003), Charger not included with CanDo World. =UTF8&psc=1
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