Gorilla Concrete Tools Silverback Dustless Joint Saw and ...- crack chaser saw road repair ,Dustless Joint Saws and Crack Chasers are used for concrete repair or restoration by preparing cracked concrete.8" Crack Repair Saw - EDCOCrack Repair Saw Training Video ; Product Spec Sheet; Only the most recently updated product information is available on this website. Call 1-800-638-3326 with the Serial# and Model# for manuals and parts list of older product models.