Wet Concrete Core Drill Bit. For wet drilling in wire mash or light steel reinforced concrete with medium aggregate. Masonry, and the like materials. Bit length: 16″ overall length w/ 13.5″ depth of cut. Arbor: 1-1/4″ – 7 threads FOR 1″ and above core bit. Arbor: 5/8″-11 threads FOR core bit size under 1″. For use on hand-held core drills and core drill rigs. Excellent choice for all type of general drilling. Plumbers, electricians, or general contractors. We carry a variety of wet core bits; each line has its own characteristic and distinctive cutting purpose. Besides Premium green line, please also assess the following links to see if there is any product line will meet your expectations. Light to moderate steel reinforcement. Moderate to heavy steel reinforcement. Very heavy steel reinforcement. For 1-1/4- 7 threads. Rush orders are welcome. We will accept return within 30 days following receipt of an item and only if the item is defective or new, unused condition. We will provide replacement orders if inventory is available and only upon request. Important Note for International Buyers. Under federal law, we cannot declare items at a lesser value or as?