The innovative Lucky TCS (Tool-less Compression System) is an upgraded version of the Lucky HIC that now comes with an integrated bolt and finger tabs which allows you to dial your pro scooter without the use of a 5mm hex key. Please Note: This shim only works with oversized bars (1 3/8" diameter) *Remember that in order to use TCS compression you need to have a starnut installed in your threadless fork. The starnut should be installed approximately 1/8" to 1/4" into the fork, just below the top of the fork