... are adjustable according to customers' requests.Available working length from 300mm to 1000mm.Available diamenter from 14mm to 600mm.Available all ... , such as 1/2"BSP, 1-1/4"UNC, 5/8", PIXIE, M16, M22, M27 and ect....Available all kinds of ... of Our Factory Quality Guaranteed. Certificate of ISO 9001: 2008 300mm/350mm/400mm/450mm/500mm/1000mm Length Diamond Core Drill, Diamond ...