For cleaning, routing and repairing of cracks in concrete and most other building materials. Diamond matrix is designed for consistent even wear. Precision balanced. Using Pearl’s unique Direct Sintering Technology (DST™) the Crack-Chaser™ is manufactured so that the diamond matrix is molecularly bonded directly to the core. Because there are no segments to fly off the Crack-Chaser™ is the safest, most effective product for re-routing cracks and crevices. The Crack-Chaser™ has been engineered to quickly sink into cracks and crevices. Simply place the wheel on the crack and let the diamonds do the work. The special design enables the Crack-Chaser™ to produce a 1/2" wide 70° V-shaped groove. This has proven to be the most effective configuration for re-caulking and re-filling.