The D-A Trial Kits are compatible with any full-size orbital tool. This includes both random orbital tools and gear-driven orbital tools. Kits are available in configurations that include 150mm pads for tools like the LHR15 or LHR12E or 180mm for tools like the LHR21 or LK900E equipped with the larger backing plate. See the brochures for each kit for the specific part numbers and additional compatibility guidance.