Detailed Product Description Masonry Laser Welded Saw BladeInner hole/Arbor: 20mm, 22.23, 25. ... : Super,Premium,Standard, Economy,Universal.NOTE: L18M10U--Laser blade for Masonry, dia 18"/450mm, segment height 10mm, Universal quality. Item no ... , Economy,Universal.NOTE: LT18M10U--Laser blade with Turbo segments for Masonry, dia 18"/450mm, segment height 10mm, Universal quality.