United Rentals is equipped to support your concrete and masonry task needs. This core bit adaptor is the perfect drill accessory. It measures at 1 1/4 in. by 5/8 in. to meet specific sizing needs. Constructed of all steel and easy to use, your drill bit can easily be adapted to get the job done. Heavy-duty craftsmanship guarantees multiple uses for application in rigorous or demanding environments. Trust United Rentals with your tool needs.