The TE 4-A18 cordless rotary hammer drills are ideal for drilling anchor holes or through holes in concrete and masonry. It is built with a keyless “click” chuck for fast and easy drill bit changes, as well as a variable speed trigger for more operator control in all drilling positions. Two drilling modes: hammer-drilling and drilling only, allows the operator to use it in concrete, masonry, and brick. Hilti Inc. 800-879-8000.