S&R Diamond Cup Wheel 115 mm / 4.5 Inch (115 x 22.2/15.88 mm, 2 Rows, Standard for Concrete, Stone, Masonry, with Reducing Ring : Amazon.co.uk: DIY & Tools
Masonry/Stone Cutting Disc 4 1/2" (115mm) x 2.5mm x 22.2mm - Screwfix
Gunpla 3 Pieces 4-1/2 inch Diamond Cutting Blade Continuous Segmented Turbo Rim Dry Wet Circular Saw Cutter Angle Grinder Disc 7/8 inch Arbor with Reducing Ring 5/8 inch for Tile Masonry :