Welcome to the world Duonio! Need to train a two-finger grip? Duonio is your best friend! This Big Brother of Monik is specifically designed to fit two fingers!
Duonio is a fresh new unique training device, which makes your fingers significantly stronger. Pocket-sized Duonio gives you many opportunities to train a two-finger grip to be able to send hard projects in Céüse, Margalef, Frankenjura or in any other climbing areas around the world with extreme finger pocket climbing!