KwikTool USA BBEX700 Bad Blade Extreme 7-Inch 18 Tooth with 7/8-Inch to 20mm arbor Bad Blade Extreme 7-Inch 18 Tooth with 7/8-Inch to 20mm arbor New dual-segmented blade concept comes from Europe where they have been usingthese specially designed diamondcuttingblades for years. Ingenious, with a specially designedsegmentlayout where every other diamond segment is made of a different diamond composite allowing the blade to become a two in one blade as it spins. Extreme cutting ability meansyou can cut hard materials like concretes, bricks, mortar, blocks and rock as well as soft materials like asphalt, clay tiles, slates, limestone and more. One blade does it all - saves you time and money by giving you two blades in one without ever having to change blades - a new generation in diamond blades.