DIY Tip of the Day: Safety Glasses/Earplug Combo. Here’s a good way to keep your vision and hearing protection together. Drill a 3/32in. hole near the end of each earpiece of your safety glasses. Pick up a pair of corded earplugs at a home center or hardware store. Cut the earplug cord in the middle and thread each half through the holes. Knot the ends about 2in. from the plugs and cut off the excess. - Andrew Combs