Milliard Exercise Web Finger Trainer/Web Hand Therapy Device - Heavy Resistance (Blue) The web finger trainer provides a huge grid of finger holes for any size hand and near infinite gripping positions. Simple to use and easy to integrate into almost any training regimen. Great for use at the gym, in yoga, martial arts, or in your living room. Dont neglect the muscles in your hands! Stretch it, grip it, pull it  make it a part of your day any way you can and it will reward you with strength and dexterity! No moving parts to break, batteries to change or instruction manuals to read. Web Finger Trainer is 31 cm. long and 25 cm. wide. Available in light, medium, or heavy resistance denoted by color.