This Ergonomic Finger Strengthener Exerciser Designed is Born for Multiple Personal Use. It Can Increase Finger, Hand & Arm Strength Fast, It is the Perfect Equipment to Help Improve Your Performance in Sports Like Rock Climbing, Football, Golf, Tennis, Guitar Etc. or Can Help Patients Recover Their Flexibility as a Therapy. Its Light Weight, Compact, & Portable, Fitting into a Purse, Carry Bag or Even Your Pocket. the Spring-loaded Hand Exerciser is Quiet, You Can Use It Anywhere Anytime. 3.54 Inch W x 2.75 Inch H x 0.98 Inch Thick