Diamond Core Drill Bits & Gemstone Drills
Core drill bits cut clean holes in stone, glass and beads.
8 products
8 products from Covington Engineering and Covington, priced from $2.00 to $325.00.
More tools
Covington Engineering
Covington Bonded Diamond Drill Bits
$2.49
Covington Engineering
Covington Manual Gemstone Drill
$325.00
Covington Engineering
Covington Sintered Core Drill Bits
$35.00
Covington Engineering
Diamond Core Drill Bits
$3.25
Covington Engineering
Gemstone Drill Head Assembly for Water Feed - Belgium Style
$185.00
Covington Engineering
Gemstone Drill Head Assembly for Water Feed - With Collet
$199.00
Covington Engineering
Notched Rim Core Drill Bits
$5.00
Covington
Ultrasonic Drill Tubes
$2.00
How to choose core drill bits & drills
Match the bit diameter and shank to your drill, and drill wet so the bit stays cool. Sintered bits last longer than bonded bits, and ultrasonic drills handle delicate stones.