Challenge your grip strength and target your forearms with Body-Solid Tools"™ BSTNG Nunchuck Grips. Use Nunchuck Grips (also known as grandfather clock grips) for pull-ups similar to the classic towel grip pull-up or add them to a rig for a challenging monkey bar course. These state-of-the-art nunchuck grips provide high-level grip strength workouts but also offer targeted forearm movements similar to a rope climb.