The Max-Lok Carbide Extension System extends and increases versatility of the company’s SDS-Max rotary hammer bits. It allows bits to drill deeper and in tight spaces with extensions ranging from 12.5- to 82.5-in. long. Users can also drill in hard-to-reach areas and drill holes larger than 1 ¼-in. diameter. The system can be driven with all rotary hammer bit retention types. Milwaukee Electric Tool Corp. 800-729-3878.  www.milwaukeetool.com