Laser welded segments for faster penetration in medium aggregate with reinforcement and maximium utilization of segment life. Reinforced concrete and harder building materials. 1-1/4" - 7 Threads adapters. Bit is 16" long to produce a 13" core. Ideally suited for hard concrete, reinforced concrete, cured concrete. Either the blade life or cutting speed could be affected concrete pipe / curbs, medium brick.