Faithfull contractor diamond dry cut core bits cut clean holes with no breakout & are suitable for brick & concrete blocks etc. They are ideal for plumbing electrical engineering installation & general building tasks. All cores are 1/2 inch & BSP threaded. Diamond cores must always be used with power drills rated at 850 to 1000 watts that are equipped with a safety clutch & variable speed function. Speeds of between 440 & 2500/min are required for the correct application of core drills. NOTE: HAMMER OR IMPACT DRILLING ACTION MUST NEVER BE USED WITH DIAMOND CORE BITS AS DAMAGE MAY RESULT TO THE CUTTING TEETH. The Faithfull FAIDC65C diamond dry core bit has the following specifications:
Size: 65 mm. Diameter Length: 150 mm. 1/2 inch BSP thread.