Core Drill Bit Adapter 5/8"-11 UNC Thread Male to 1/2" Shank Diamond Power $13.5 Type Core Drill Bit Adapter Brand Pro Right industry condition New Product DetailsDescription: 5/8"-11 thread (male) fits 1/2" shankSpecification: 1x 5/8"-11 thread (male) Fit most regular power drillIndustrial grade materialIndustrial Grade SteelAdapter only, bit not included