| http://www.w3.org/ns/prov#value | - (a) a resilient foam body having a rear surface and a working surface substantially orthogonal to the axis, the working surface spaced from the rear surface along the axis, the body including a peripheral surface including an inclined facet and a curvilinear facet; and (b) a coupler pad sized to be received in the recessed engaging surface and releasably engaging the recessed engaging surface and
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