• Best For: Crews whose 16 inch saw uses a 20mm arbor shaft and who need a general-purpose concrete and masonry blade.
• Highlight: Same 16 inch MK-799D high-speed blade as 158939, but bored for a 20mm arbor instead of 1 inch.
• Expert Note: Check the arbor on your saw before ordering: 158939Z fits a 20mm shaft, while a 1 inch shaft needs 158939; both cut a .140 inch kerf.
