Does your drill go as fast as the manufacturer says it will? Well, you’d need a tachometer to figure that out. They’re not that expensive to buy, but as [Elite Worm] shows, they’re not that expensive ...
The battery-powered PLT200 portable optical tachometer uses a laser light source to operate up to 25 ft from a reflective target. The ergonomic design allows safe, direct line-of-sight viewing of both ...
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