"This continuous wet/dry blade from QEP makes quick cuts in ceramics, porcelain and marble tiles. Blade Diameter in. 4, Blades qty. 1, Arbor Knockout 7/8mm, Arbor Size in. 5/8, Blade Use Ceramic, porcelain, marble. Cuts ceramics, porcelain and marble 7mm rim height 060' wide 5/8' arbor with knock-out ring to create 7/8mm arbor"