By sandwiching it between the foil mast top plate and the board, you can angle the foil base by 1.0°. *Cannot be used stacked. Compatible with M6 and M8 bolts. Shipping is only available on weekdays. Please be aware if you are in a hurry. We also have other wing foiling accessories such as harness hooks and belts listed. See my listings here ⬇⬇⬇ #BCWorksウイングフォイル Harness belts and hooks are also ⬇⬇⬇ listed ⬇⬇⬇ #BCWorksウイングフォイル If you are new to Mercari, you will receive a "500 yen point gift" that can be used next time by using the "referral code" below. ⬇⬇⬇Referral code is here⬇⬇⬇ WUADRG Wing foil Wing foil wingfoil foil