Color Changing Lens Tester Blue Light Proof Detector Purple Light Glasses Tools Instrument Picture Foot Protection 1x Phillips screwdriver knife（PH2*100)

1x Phillips screwdriver knife（PH2*100)

simple and fast

Pearl Cotton Board Shockproof Black 100 * 200 * 2 Cm

Hardness high toughness strong torque great effort saving wear resistance rust and oil prevention

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Color Changing Lens Tester Blue Light Proof Detector Purple Light Glasses Tools Instrument Picture Foot Protection 1x Phillips screwdriver knife（PH2*100)Ships FREE Handling Day: 1 3 Days, Arriving Day: 15 35 Days[SHORTDESCRIPTION] 1. The color of the lens changes a few seconds after the color changing lens is placed in the test area 2. Press the anti blue lens against part of the blue light test card and put it in the test area. The unblocked part of the blue light test card becomes dark 3. The color of ordinary lenses does not change no matter how long the exposure 4. 3 kinds of lens contrast 5. 30s