LogestMetal Hand Grip Set, 100LB-350LB 6 Pack 50LB-350LB 7 Pack No Slip Heavy-Duty Grip Strengthener with Gift Box, Great Wrist & Forearm Hand Exerciser, Home Gym, Hand Gripper Grip Strength Trainer

Well made with various sizes from beginners to experienced strength training.Was quite expensive but you get what you pay for and should last a long time.For the more serious trainer.

Was excited to have a tool for building grip strength and forearm muscles. I just flipped over the box to have a quick read and I noticed a small "Warning P65!" by the barcode. "Huh, what the hell is that?" a quick google search later and I discover it is placed on products that have cancer causing and reproductive damaging qualities :DThanks Amazon! I'll be sending this trash right back to you. Now begins my quest to obtain a grip strengthener that doesn't cause cancer or cause birth defects.EDIT: Bought myself some Captains of Crush ones, only to see "Warning! They can break!" Then find stories of them snapping on people and shards flying and injuring them. What a dumb invention. I want to build grip strength and forearms, not play Russian roulette.More time and money wasted on lesson from University of life. Not worth the risk, can you imagine it? "What took you out son? ... a shard from a gripper severed my artery or went into my eye" F*** that. Just stick to dumbells and barbells.

I bet, those handgrippers are made for those with tough palms, like i have, my cousin's girlfriend tried them, bec she was curious, and she said her palms are hurting, so, for those with fine palms, search something else! Amazing handgrippers.