Jig is a lubricant to be sprayed on the axles, but only for oil (not graphite). However BE CAREFUL. Once you spray it on the nails, it must sit for several hours to let the liquid evaporate. Put the axles on a small board, and immediatly after spraying, tap the board to allow the excess Jig to drop off. Also, blow off the Axles with compressed air to be sure there are no hairs or other small items on the axles (this is important).The Liquid will ruin the wheel bores if it is still wet. 4 hours should be enough. This is done as the last step in axle prep, prior to mounting the wheels. So that means all the previous axles steps must have been completed. It really works well, and all the league racers use it. Jig is sometimes hard to come by. Go to Ace Hardware, but they usually will have to order it. BTW, be sure to shake the can well b4 spraying it.