Gryyp Line S.L. are the leaders in emergency roadside puncture repair equipment for motorcycles, scooters and cars. No tools required No mechanical ability or special skills required No force required, Cargols screw into the tyre with ease Extremely quick, it takes less than 30 seconds to install the plug No glue to go off before you need to use it Compact size will fit easily under any motorcycle seat No dirty hands to try and clean on the side of the road See how the system works here: http://www.gryyp.com/cargol/ing.html Grypp Website How they work