The Magic-Stud-Finder from Biary Innovation uses XtremeMagnets to provide 100 percent accuracy in locating both wood and metal studs with no batteries and no electronic parts. It locates stud screws and automatically releases the magnets onto the wall, targeting the exact location of the stud and eliminating the need for wall markings.
General Tools & Instruments offers the model 1702 digital protractor. The protractor displays absolute and relative angle measurements in a large LCD window.
General Tools & Instruments' HT 10/20/50 USB humidity/temperature data loggers can record up to 16,000 data points per unit (up to 8,000 pairs of ambient temperature and relative humidity readings) over a period of days, weeks or months. Each data logger in the HT series has a temperature measurement range of 4 F to 158 F, and an RH range of 10 percent to 90 percent, according to the manufacturer.
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