• Highlight: MK Diamond's MK-505 at 20 inches keeps cured-concrete cuts running smoothly on mid-size walk-behind saws — laser-welded segments and a stable steel core handle aggressive feed rates without wobble.
• Best For: Concrete sawing contractors, foundation repair crews, and utility-line cuts where 20-inch depth covers most slab and curb work.
• Expert Note: 20-inch is the sweet spot for trench and slab cuts to about 7-inch depth; keep a 14-inch backup blade on the truck for tight-space work the bigger blade can't reach.