Harrows Clic System. Constructed from a new and unique Polycarbonate material, this shaft allows the Clic flight to rotate 360 degrees which helps to eliminate bounce outs but also allows closer grouping and higher scoring. The construction has been designed to give this shaft 17 degree of longitudinal flex to reduce deflections. Use with Harrows Clic Flights Only. Harrows Clic System - Shafts - Slim - BlueHarrows Clic System. Constructed from a new and unique Polycarbonate material, this shaft allows the Clic flight to rotate 360 degrees which helps to eliminate bounce outs but also allows closer grouping and higher scoring. The construction has been designed to give this shaft 17 degree of longitudinal flex to reduce deflections. Use with Harrows Clic Flights Only.