a door check 1 as it impacts face 44 of doorstop 42 see fig8 11 a suitably resilient impact pad or plate can be provided to avoid damage to doorstop 44 as is well known in the art it should be clear that the action arm 4 may be a single integral element or an assemblage as indicated in fig1 and 8 and may present any appropriate shape as long as it has sufficient reach to achieve a desired gap also suggested in fig8 when engaged against a face 44 fig1 of doorstop 42 fig9 11 advantageously action arm 4 would include a broadened impact surface at its distal end 20 see fig1 3 9 10 the purpose of broadening the impact surface is to reduce the possibility that the arm will be snapped off or that the arm will cause impact puncture damage to the wooden frame reveal distal end 20 may of course be a single flattened element that is either integral with or attached to the arm 4 other shapes may be adequate as will be explained a resilient tip not shown may be added to distal end 20 if so desired device 1 base member 8 to which the articulated action arm 4 is pivotally journalled on pin axis 26 may be fastened to the door 40 fig8 11 in any of a variety of ways base member 8 may be attached by removable attachment elements to intermediate wedge shape shim element 16 fig9 for example by removable bolt 30 engagement with matching nut 29 in a rear face recess 31 of shim element 16 fig5 6 however alternative arrangements may be adequate as well as discussed below the purpose of the wedge shape shim element 16 is further discussed.