Check the listing for details. 1 Inch Diamond Core Drill Bit for Concrete Asphalt Soft Slate Laser Welded. Condition: New. Listed at 45.00 USD. 1" Laser Welded Wet Diamond Core Drill Bits Hole Saw for Cutting Concrete and Asphalt Super Plus Quality, Fast Drilling, 1" Diameter5/8"-11 threads17" Long to produce 13-1/2 inch core Materials and applications: Industrial-grade diamond water drill is widely used in many fields. Concrete, Masonry, Blocks, etc. Hard Sandstone, Coarse Sandstone Breeze Block & Soft Slate Equipment: Hand-held core drills or core drill rigs Free Shipping & Returns: · SAME business day shipping · FREE 30-Day returns Contact us: Should you have any questions, please kindly contact us through eBay messaging service Click on the: "ask a seller a question" link on the listing page. We answer most questions instantly. Thank you for shopping with DPT Diamond Tools!