Strongman Grips Heavy Duty Hand Grippers - Set of 3 (125, 175 & 225 lbs) Resistance from 125 inch-force-lbs ("lbs") up to 225 lbs High quality, knurled aluminum handles and heavy duty springs are built to last The perfect compliment to our Six Pack so that you can build your strength one step at a time Perfect for athletes who are looking to increase their hand and grip strength