Camel Grinding Wheels (CGW) offers rigid, semi-flex discs for aggressive grinding applications. The discs are equipped with a stiff phenolic resin fiberglass backing, which is designed to increase control when grinding corners and edges. The backing material enables the disc to be used without a back-up pad and prevents deformation due to use, heat or humidity. The discs can be used wet or dry for applications such as grinding fiberglass forms and shower surrounds. The discs are available in 16-, 24- and 36-grit sizes, type 27 shape, and in 4 1/2", 5" and 7" diameters with 7/8" or 5/8-11 arbor holes.