Buy LEGO Bars and Antennas
Bars need to be clicked into another Lego piece such as a minifigures hand, while antennas attach directly to Lego studs. Bars and antennas are both great for attaching flags and shields. Their length is given by how many studs long the rod is when laid next to a Lego brick or plate. The "Bar 1 x 4" is the bar you want if you're looking for the kind that Lego Ollivander sells, or if you want a Lightsaber blade to put in your favourite hilt.