The uses for these small 1/2" diameter circular stick on bumpers is endless. They add protection, dampen drawer and door closure sounds, create a non slip bottom and grip the surface below them. They are great for home, office and useful in crafts. To keep them protected and organized, we include a durable plastic storage case. To use on glass table tops, carefully remove the glass from its base to avoid scratching and chipping. Clean both sides of the glass top and table base using a lint-free cloth and glass cleaner. Remove our rubber bumpers from pad and stick to base of table. Carefully replace glass on table then press the top gently on the bumper. We are a family owned business and have been making products for over 35 years. We have remained in business for so long because we are equally committed to making exceptional products as your full satisfaction, LOVE OUR RUBBER BUMPERS OR GET YOUR MONEY BACK! If you are unsatisfied in any way, please contact us to for a full, no questions asked refund.