𝗣𝗼𝗿𝘁𝗮𝗯𝗹𝗲 𝗚𝗿𝗶𝗽 𝗦𝘁𝗿𝗲𝗻𝗴𝘁𝗵 𝗧𝗿𝗮𝗶𝗻𝗲𝗿: FITBEAST's hand strengthening devices is great for fitness on the go. With a detailed instructional manual and tutorial guide, this set walks you through every exercise, from beginner to advanced grip training.