Bahco Superior™ Multi Construction Holesaws have carbide tips and are capable of cutting through brick and ceramic tiles laminate fibreglass and hardwood The tooth tips consist of a carbide round rod which is fusion welded to the back material the tip is then ground to its final shape with a 5° positive cutting angle They have a low friction coating that minimises heat generation and wide gullets for effective chip removal They fit all power drills both stationary and portable