Karver and Alphalock have announced an agreement for Karver to acquire Alphalock’s business and develop its sail-lock technology, combining the French deck-equipment manufacturer’s range with systems designed in the United States by company founder Eric Hall.
The agreement covers rights to use Alphalock’s patents and know-how, alongside the transfer of technical knowledge, product documentation and business relationships.
The companies say they will work together to maintain continuity for existing customers and partners.
Alphalock’s patented mechanism uses magnetic assistance to control locking and releasing a halyard.
It has one moving part, with no springs or release lines, an arrangement intended to simplify maintenance and sail handling.
The technology can be adapted for internal and external mast installations, headsail halyards, reefing and tack points, and other rigging or deck applications.
Integration
Karver plans to integrate the products gradually for racing, cruising and large yachts.
“We are delighted to take this technology to a new level,” explained Tanguy de Larminat, Karver’s chief operating officer.
The acquisition is intended to expand Karver’s existing lock portfolio: internal KMH locks, external KHL locks, KFH furling locks, KHR reef hooks and KMS mainsail locks.
Development plans also include adapting products to Antal’s mast tracks and cars, and introducing magnetic solutions under the ‘Powered by Alphalock’ brand.
Karver says the combined offering will serve shipyards, sailmakers and system integrators, with applications ranging from offshore racing to superyachts.
Modern design
It plans to maintain supply, technical support and sales assistance as Alphalock products enter its catalogue.
Eric Hall also founded Hall Spars in 1980 after working in aerospace composites at Grumman and contributing to the Intrepid programme for the 1970 America’s Cup. He was inducted into the US National Sailing Hall of Fame in 2024.
“I have followed Karver since its creation and have always admired the combination of modern design, elegance and strong innovation that characterises its products,” he said.
Karver will showcase the collaboration at Metstrade in Amsterdam from 17–19 November 2026.
