LED Clever Collar

From the website:
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LED Clever Collar

Just slip this Clever Collar over the business end of your screwdriver and rotate the ring.

Instantly, 3 bright LEDs flood your work area with a powerful beam that takes out the guesswork.

Flexible center hole slides onto any manual screwdriver from 3/16"–7/16" diameter and onto cordless 1/4" power drivers.

Also doubles as a handy inspection light with strong internal magnets to hold it in place.
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$14.95.