Relton Carbide Quik-Stop SDS+ Shank Stop Drill Bits for Masonry will drill to the ideal hole depth for setting standard length Drop-In masonry anchors. The integrated Stop Collar allows the user to drill to the depth required and prevents over-drilling, minimizing the risk of hitting rebar. Relton Quik-Stop bits will save time and effort, reducing unnecessary drilling effort and worker fatigue. Ideal for overhead drilling applications.