• Best For: Fabricators sizing a hole at 1-5/8 inch in granite, a step larger than the 1-1/2 inch 158923 allows.
• Highlight: MK-290GW premium-grade construction in the 1-5/8 inch diameter, purpose-built for granite rather than softer tile.
• Expert Note: Keep a constant water feed when coring with this 1-5/8 inch bit, and check the thread on your drill before ordering, since only the diameter is printed for 158924.