The Streamlined Twist on Base is the ultimate, tough, urethane tendon joint deckplate.
This Twist on Base is the most reliable and safest base ever made, every respectable windsurfer should own one! Urethane replaceable UJ, full UJ swivel to prevent wear and stress loading.
They are really easy to get tight on your board and easy to undo again. Highly recommended produce by 2XS.