5 each 1/25". The most popular diamond glass drill bit.FREE 5 page "How To" Drilling Guide. Great for beginners.FREE shipping in the US100% Money back guaranteeYou'll drill sea glass, sea shells and beach glass. Easy to use instructions. Use a simple kitchen scrubbing sponge to hold your glass and beads.You drill holes for beading wire, chain, fishing line, jump rings and earring findings.The 1/8" shank fits your drill, drill press or Dremel tool with a 1/8" collet or adjustable chuck.You'll make jewelry and other craft projects for friends and family.