The Four Implements (the Wand, Cup, Dagger, and Pentacle) are perhaps the most iconic and memorable set of tools in the Golden Dawn tradition, relating to the four elements, the Tetragrammaton, and the four suits of the Tarot.
Due to their elemental nature, some groups have incorporated their use into the Outer Order, tasking initiates to make and consecrate each particular tool in the grade related to that particular element. On the surface this might seem like a good way to better imbue the tool with the associated element, but the big problem with this, aside from Inner Order teaching not belonging in the Outer Order, is that these four implements are not to be separated (as would be the case if divided by the four Elemental Grades).
Ritual G tells us that these implements "have a certain bond and sympathy between them," elaborating as follows:
"So that even if one only is to be used, the others should also be present. Even as each of the four Elemental Tablets is divided in itself into four lesser angles representing the other three elements bound together therewith in the same Tablet."
Thus, even in the consecration of each implement, the other three are present on the altar, and, indeed, actually employed in the consecration ceremony itself (along with the Sword, which is often used in conjunction with the Elemental Implements).
In Flying Roll XXVIII, Mathers and Westcott reinforce this teaching:
"The four Elemental Implements should be all laid on the table before you for immediate use as required. The whole four must be present to preserve a certain balance and harmony in the sphere of your aura..."
Thus, these implements should be left until 5=6, where they can be constructed and used together, as intended.