Beading needles come in a variety of sizes and lengths. They are thinner and have a much smaller eye than other sewing needles, and as such, threading the needle can be a difficult and frustrating experience. In the manufacturing process, the eye of the needle is punched and ground into the head and sometimes results in there being tiny burrs within the eye of the needle. If you are having trouble threading the needle it might be that you are trying to pass the thread through a particularly burred side of the eye - rotate the needle and try threading through the other side of the eye. Flattening and wetting the tip of the thread makes it easier to pass through the eye, and the ultimate assistance can be gained by using a needle threader.