... long life Diamond Core Drills in 1-1/4" UNC Connection Thread.For wet cutting very wide range of building materials, such ... of connection thread, such as 1/2"BSP, 1-1/4"UNC, 5/8", PIXIE, M16, M22, M27 and ect....Available all ... /500/10001-1/4” UNC21215450/5001-1/4” UNC21815450/5001-1/4” UNC220, 22515450/5001-1/4” UNC227, 23015450/5001-1/4” UNC25016, 17, 20450 ...