I've been the Marketing Director for Glass Block USA for more than 10 years. We sell and install glass block windows and walls in 15 states. I've watched the development and growth of glass block in the crafting industry explode over the last few years. Drilling glass block can be a time consuming and costly undertaking for any crafter wanting to do it on their own. We've taken the added cost of time and breaking glass block out of the equation, by offering case quantity pre-drilled glass shipped directly to your home. So don't waste time and money, place your order today.  Just ask for Mr. Glass Block  at (877) 427-8775