One of the first people to adopt the Smith-It as “everyday carry” was Captain Chad Cave of the Frederic County (MD) Department of Fire and Rescue Services (top row of photos). Chad joins the Estwing rock hammer to his Pro-Bar using a spring-loaded bolt and washers. The second example (bottom left, above) sandwiches the rock hammer between a Malven Hawk Tool and a Halligan– a knurled knob replaces the wing-nut to facilitate adjustment of the spring tension while wearing gloves.