These holds can be used for warming up on outdoor rocks or during competitions. They are made of plastic and produced with a 3D printer. 【Product Features】 You can use these to warm up your crimps and pockets by hooking your feet and pulling. Each hold comes with a string. ・Crimp Hold Pulling the central crimp part works the finger muscles, while grabbing the whole thing works larger muscles. Hole diameter: 8cm wide, 2cm high, 2cm deep ・Pocket Hold Designed to fit two fingers. The hole goes all the way through, so you can adjust the load by varying the depth. Hole diameter: 4.2cm wide, 2cm high, 3cm deep See images 4-7 for usage examples. ※ PD9 is not included. It is shown for size reference. 【Friction】 Each hold is designed to provide friction. You can feel some friction even without chalk. Using chalk or PD9 will allow you to feel sufficient friction. The creator finds it sufficient to use without chalk. ⚠️ Usage Notes Compared to general resin-molded or urethane holds, the strength is inferior. The creator uses these regularly, and no major problems have occurred to date. Please use at your own risk. #bouldering #climbing #training #holdtraining #crimptraining #pockettraining #hold #warmup