Stop for a cutting tool for cutting a sheet made of a reconstituted material, the tool comprising: • a mount, • a blade mounted on the mount so as to pivot by way of a pivot pin between an open position for receiving, between the mount and the blade, the sheet which needs to be cut, and a closed position at the end of a cutting operation, • a slot intended to receive at least a part of the blade during the cutting operation, the slot being borne on a portion of the mount having a given width (Ls) and comprising a proximal end close to the pivot pin and a distal end remote from the pivot pin, • a notch that opens into the slot in the vicinity of the distal end, the stop being characterized in that it has a first use position known as the "cutting" use position and a second use position known as the "edging" use position, the stop comprising: • a median wall that is intended to be force-fitted in the notch and comprises: - a first flat face, known as the "contact" face, on which a lip, known as the "support" lip, is arranged, said lip extending in a first plane perpendicular to the contact face and being positioned so as to be flush with the level of the slot in the cutting use position; - a second flat face, remote from the contact face, on which a lip, known as the "edging" lip, is arranged, said lip extending perpendicularly to the second flat face in a second plane parallel to and offset with respect to the first plane of the support lip, so as to be flush with the level of the slot in the edging use position. • a mount, • a blade mounted on the mount so as to pivot by way of a pivot pin between an open position for receiving, between the mount and the blade, the sheet which needs to be cut, and a closed position at the end of a cutting operation, • a slot intended to receive at least a part of the blade during the cutting operation, the slot being borne on a portion of the mount having a given width (Ls) and comprising a proximal end close to the pivot pin and a distal end remote from the pivot pin, • a notch that opens into the slot in the vicinity of the distal end, • a median wall that is intended to be force-fitted in the notch and comprises: - a first flat face, known as the "contact" face, on which a lip, known as the "support" lip, is arranged, said lip extending in a first plane perpendicular to the contact face and being positioned so as to be flush with the level of the slot in the cutting use position; - a second flat face, remote from the contact face, on which a lip, known as the "edging" lip, is arranged, said lip extending perpendicularly to the second flat face in a second plane parallel to and offset with respect to the first plane of the support lip, so as to be flush with the level of the slot in the edging use position. - a first flat face, known as the "contact" face, on which a lip, known as the "support" lip, is arranged, said lip extending in a first plane perpendicular to the contact face and being positioned so as to be flush with the level of the slot in the cutting use position; - a second flat face, remote from the contact face, on which a lip, known as the "edging" lip, is arranged, said lip extending perpendicularly to the second flat face in a second plane parallel to and offset with respect to the first plane of the support lip, so as to be flush with the level of the slot in the edging use position.