Abstract: A clamp for a T-slotted structural element can be positioned anywhere along the T-slot. A housing and stop are opposingly attached to the structural member, and a horizontal shaft is engaged with the housing. A fixing pin is inserted through a vertical hole in the housing and attached to a slot key that is inserted in the T-slot. Actuating a lever or handle applies an upward force on the fixing pin, pressing the key against the top of the T-slot and fixing the housing in place. In embodiments, the stop can be repositioned to any of a plurality of locations along the T-slot. In certain embodiments, the stop and housing can be placed on different surfaces of the structural member. In various embodiments, the stop and/or housing are constructed with different slot profiles that match their respective T-slotted structural elements. In embodiments, the housing is rotatable.

Abstract: An assembly for the jaws of an article clamp. The assembly includes first body (23) receivable onto one jaw (11) of the clamp. The first body (23) has a first clamping face (25), and first support surface (26) to support the article. Fingers (31) are provided to removably secure the first body (23) to the one jaw (11) of the clamp. A second body (24) is receivable onto another jaw (12) of the clamp. The second body (24) has a second clamping face (27) cooperable with the first clamping face (25) to engage the article, and second support surfaces (28) to support the article. Fingers (31) also are provided to removably secure the second body (26) to the other jaw (12) of the clamp.