Rotary Core Bit - 12" - 1/2" Shank - 1 1/4" DIA by Bon Tools Save Liquid error (product-badge line 32): -Infinity% $64.99 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Carbide tipped for drilling all masonry materials 12” long with a hexagonal shank Length: 12" Diameter: 1 1/4" Shank: 1/2"