10-METRIC EYE DRILL BIT SET Glass eyes are sold in metric sizes (mm), but ordinary drill bits are in inch fractions, so the eye never fits the hole! The solution to perfect fitting eye sockets is metric sized brad point drill bits! Sharp brad point holds bit on center. Mastercarver® brand drill bits feature “twin lands” for cool operation, cleaner cuts and minimal tear out. Set includes wood storage box plus bit sizes: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm. Note: sizes 7mm – 12mm have standard 1/4″ (6.3mm) shanks.