System for retaining a substrate within a frame

A kit for constructing a framed canvas article comprising:

• an adapter fixture for use with a first adapter, the adapter fixture including:
• a fixture base that defines a platform for receiving the first adapter;
• and
• a plurality of linkages that are disposed about the platform and coupled to the base, each linkage being configured to move between a first position in which a fence bearing surface thereof is at an angle other than 90 degrees relative to the platform and a second position in which the fence bearing surface is set at an at least substantially 90 degree angle relative to the platform for locking and holding the first adapter in place;
• wherein the first adapter includes:
• an adapter base having an open space defined by a floor and a plurality of side walls that extend upwardly from the floor, the adapter base having a first pin that is coupled to and extends upwardly from the floor, the first pin being located at an outer corner of the adapter base;
• wherein the adapter base is disposed on the platform and is locked in place with the plurality of linkages when the plurality of linkages are in the second position.