Segmented Rim for building materials 230mm For concrete, brick, concrete pavers, masonry/block, hard/reinforced concrete, and limestone Professional Series Diamond Blade with Segmented Rim for building materials. Standard 22.23mm bore size to fit all makes of handheld angle grinders. Segmented Rim blades give the roughest cut and is used for concrete, brick, concrete pavers, masonry/block, hard/reinforced concrete, and limestone. This blade is usually referred to as a dry cutting blade. It can be used on dry applications without water due to the segments (cut outs) on the edge of the blade. The segments allow for air flow and cooling of the blade core. The segments also allow for better “exhaust” of debris, allowing for a swifter cut. One of the risks to the lifetime of a diamond blade is overheating, which affects the bond and can warp the blade. Segmented blades are the best option when water is not available. Segmented blades are not recommended for cutting tiles, the blade is going to chip the tile, leaving an awful finish.