Product Specification: ​ ​Material:Carbide ​ ​Shank Type: SDS plus ​ ​Length: approx. 110mm ​ ​Size:4mm,5mm,5.5mm,6mm,6.5mm,7mm,8mm,9mm,10mm,12mm ​ ​Carbide tipped cross head drill bits, features precision cutting tips for quick, smooth cut and finish ​ ​Twin spiral, drilling efficiency, high precision ​ ​Long lasting life and features 4 cutting edges for hard masonry materials ​ ​Double pit double slot and round shank for efficient waste removal ​ ​Use by electric drills and drilling machines ​ ​uitable for clinker, concrete, brick, natural or artificial stone ​ ​Note: ​ ​Please allow minor difference due to manual measurement.