When lives & property are at stake, you can rely on testing & maintenance products from HSI. Recognized world leader in design & manufacturing of smoke & heat detector testing products & equipment. Our patented products are reliable, easy, & affordable.

WHEELER-REX-specialty tool manufacturer of pipe cutters, threaders, test pumps, tube tools, plastic tools, valve exercisers, shut off tools, pipe wrenches, drilling & tapping tools, fastening tools, hole cutters, crimp tools, vise stands and trash pumps.