• Highlight: The MK Diamond MK-190 3/4-inch wet diamond core bit drills precise, chip-free 3/4-inch holes in porcelain, granite, marble, and other vitreous tile and stone.
• Best For: Bathroom and kitchen tile installers and stone fabricators making 3/4-inch through-holes for shower valves, supply lines, and structural anchors.
• Expert Note: Backing up the tile with a sacrificial board catches the break-through and prevents the bit from grabbing - the cleanest exit hole comes from drilling halfway, flipping, and finishing from the back.
