Chotki Flip Rosary Перекидные четки handmade 3D printed 21 cm. They're great tool for people who sit at desks and type all day, great for arthritis needs and working out your fingers. great for truck drivers who drive all day etc. Chotki work out your fingers and wrist in so many ways preventing arthritis and keeping your hands busy, whilst making them stronger . P.S: Chotki are connected by a thread - stretching too much will rip