I just picked this up on ebay for $17.99 plus shipping. A nice alternative to the standard hand grippers you see at sporting good stores. Instead of buying several grippers as your strength increases, the Ivanko uses high quality springs that can be adjusted to change the resistance level. Amazingly, there are about 50+ resistance levels on this thing, ranging from 45 lbs. to 345 lbs. (which is only 20 pounds less than it takes to close the number 4 Captains of Crush gripper). So you basically get more than a whole set of CoC grippers (which are about $20.00 a piece) in one training tool. It’s also a lot more comfortable to do sets with than a standard hand gripper. Highly recommended if your looking to increase your grip strength for any number of reasons…weight training, boxing/mma, guitar, sports…you get the picture.
Ivanko Super Gripper