Check the listing for details. FIT FLIGHT GEAR NORMAL SPINNING DART SHAFTS. Condition: New. Listed at 8.00 USD. Thread is approximately 40% strongerTop where flights lock on are approximately 30% strongerOverall strength is enhanced by using polycarbonate resin It's now easier to tell between locked and spinning... Spinning shafts have a rounded top and Locked shafts have a flat top. Also, the top of the locked shaft is now in a matte finish Only work with Fit Flights If you install flights onto a Locked style shaft and then onto a Spin style shaft, you may notice the flight is looser than normal and may pop off easier. Avoid this by using separate flights for Locked and Spin shafts. While the manufactures are using materials that should enhance the strength of their polycarbonate shafts-there is no warranty on either shafts or flights All Dart Shafts are Sold in a set of 3 Powered by ExportYourStore.com