Required to store the EDC toolkit in your steerer tube. Due to the unique design the OneUp Top Cap is required to store the EDC Tool Kit in your steerer tube. The Top Cap threads into your steerer (Tap Kit sold separately) and tightens with a standard cassette lockring tool. You may be wondering ' What happens if I need to tighten my headset on the trail?' No need to worry the multi-tool that comes with EDC toolkit includes a cassette lockring tool. Please note: Your steerer tube will need to be threaded to use this top cap and the EDC toolkit. \u200B* We're Australia's #1 retailer of MTB parts, clothing and accessories! Orders ship next business day. Note orders may incur NZ customs duty or tax - see whatsmyduty.org.nz.