For all orders exceeding a value of 100USD shipping is offered for free.

Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.

Otherwise, standard shipping charges apply. Check out our delivery Terms & Conditions for more details.

USE DRY OR WET - Use Cougar HD Premium Concrete Core Bits dry or wet in most drilling conditions. Drills cured concrete with rebar, brick, block, masonry, stone and most similar materials.

NOTCHED TURBO SEGMENTS - Unique "chipbreaker" style turbo segments reduce drag, penetrate quickly and produce fast, straight holes.

HIGH PRODUCTION DRILLING - Bits hold up under extreme heat and pressure and will produce more holes (at a lower cost per hole) than any competitor.

SPECIFICATIONS - 4-1/2" outside diameter (drills 4.5" holes) with 5/8"-11 threaded arbor and 9" barrel length. Use with most core drilling machines, hand-held drills (adapter required) or variable speed grinders. Drill at 500-2,500 rpm for best results.

LIFETIME WARRANTY - All Delta Diamond Products, Inc Diamond Blades, Coring Bits, Hole Saws and Grinding Wheels include a lifetime warranty against warping, cracking, and material defects. If any diamond tool (being used under its intended use with at least 50% wear left) fails to cut or work properly, or if the bond between the diamond segment and the steel core becomes separated at any time, the diamond tool will be replaced.