GRSA INTERNATIONAL was formed and then launched at the start of 2022 as an independent but far-reaching international association for stringers.

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GRSA INTERNATIONAL looks at the global picture!

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The new GRSA certification tests (including online courses & online testing) are made up of the latest stringing techniques, trends in racket sports, including tennis, badminton, racquetball and squash. These new certification tests are available in multiple languages.

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The GRSA INTERNATIONAL A-Z OF STRINGING GUIDE and GRSA INTERNATIONAL ATW MAGAZINE are just two parts of the GRSA Stringer educational system.

 

A major part of improving stringer’s skills will be achieved through workshops in different countries by some of the most experienced stringers in the industry.

Metortune brings racquet tuning to the next level.

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A precise digital swingweight, twistweight, balance and static weight measurement device and autotuning using our sophisticated software in one easy to use package - Metortune.

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This portable device lets you tune racquets in a couple of minutes to above pro-room standards,
at your shop or directly on the court powered by a 5V powerbank!

Whether you're dealing with tennis, badminton, padel, or pickleball racquets (optional grip available), 
the Metortune is your go-to customization machine for unmatched accuracy and and speed.

 

​If you'd like to buy one for yourself, enter the code 'racketspec' at the checkout to receive a €500 discount off your purchase.