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A 3 lb rotary rock tumbler with four speed settings and a 1 to 9 day adjustable timer, aimed at beginners and hobbyists turning rough stones into polished ones. The sound-reducing PC cover and TPU drum are the practical touches: rotary tumblers are noisy and run for weeks, so quieter operation and a flexible drum matter more than speed. It sits in the same class as National Geographic and Dan & Darci kits, but those usually bundle grit and stones while this one is sold as the machine. Pick it if you already have rough rock and abrasive grit, or want a larger 3 lb barrel than the common 1 to 2 lb hobby units.
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Lowest price we've seen: $59.12 on Nov 13 at Amazon; highest $88.99 on Nov 1. Tracked across 5 stores since Nov 1.
This rock tumbler kit is a 3 lb rock polishing machine for beginners, adults and hobbyists. It has a TPU drum and a durable direct drive motor.
It offers 4 speeds and an adjustable timer that can be set from 1 to 9 days. A sound-reducing PC cover helps keep noise down while it runs.