45 MM Diamond Hole Saw (for 1" ABS Bulkheads)
Diamond hole saws are the best option for cutting holes in glass aquariums at home. Make sure your glass isn't tempered, use a template and water to ensure a clean, cool cut. Do not put pressure on your drill while cutting. Check diamond coating before each use. Drilling without water will significantly reduce the life span of the bit. 45 mm bit is the perfect size hole for a 1" ABS bulkhead.