You’ll make lighted holiday decorations. Easy drilling instructions mean that you can make wine bottle lights and lighted “Christmas presents” from glass block. As a bonus, you can use these bits to make bird feeders too.

Diamond core bits drill holes in wine bottles or glass block in just 1-2 minutes. You won’t break any bottles or glass block.

These diamond core bits (diamond hole saws) are the best value that you’ll find on the web or anywhere else. They have a 1" depth of cut, 5/16" arbor or shank. Use your regular handheld drill or drill press. Easily drill 20-30 holes with each bit.