This is a Captains of Crush No. 3 gripper modified with an adjustable choker. The choker allows for easy adjustment of the handle width. Even with the same RGC (Resistance Grade Classification), the perceived difficulty changes by setting the width to a more comfortable position. ! To avoid damaging the threads, it's recommended to set the width by gripping the gripper and turning the knob nut, rather than just turning the knob nut alone. ! Although not officially rated, it feels like a No. 3 that's slightly harder than average. It's been used only for the modification and 15 test closures, so it's technically a used item. Please judge the condition of the handles and spring from the photos. The choker mechanism is all stainless steel except for the knob nut, which is high-carbon steel. The choker can be removed if you no longer need it. In my personal opinion, it's much easier to use than other choker methods and safer than clamps. The only drawback is that if you grip the nut with your entire pinky finger, the handle becomes longer and the RGC decreases (please see the last photo). Everything in the photos is included. Thank you. #gripper #ghp #coc #chokergripper #handgrip #gripper #gripstrength #forearm