the 21mm wrench, tube and other things you want to carry finding the right bag is kinda hard if not impossible. I did leather carving when I was in my was in high school, I am in my mid 50's now, anyway I figured what the heck, to get what I want I will have to make it myself. the bag is for the handle bars, my 21mm wrench, tube,pump, all my tools, a sandwhich and a few cold drinks will fit it in it. the skulls are snaps to keep it closed. the dragon I hand carved. I am really happy with the results. next I will make my battery bag and also I custom seat is in the future. the leather is over 1/8'" thick and should last a lifetime. I don't know about you all but it seemed I was sewing or replacing my canvas bags every time I turned around.