Precision-machined cutting edges. SDS Plus shank. Use with Silverline TCT Masonry Circular Cutter 633780. Use with SDS Plus drill with ‘Roto Stop’ feature only. Suitable guide hole must be pre-drilled. Precision-machined cutting edges. SDS Plus shank. Use with Silverline TCT Masonry Circular Cutter 633780. Use with SDS Plus drill with ‘Roto Stop’ feature only. Suitable guide hole must be pre-drilled.