They are solid plastic with softer gripping areas. The spring is adjustable by turning the red knob making the exercises go from somewhat easy to much harder. Bought two sets of the hand grip strengtheners primarily as a way to practice clutch and brake maneuvers for a new motorcycle.
First of all, I'd like to say: Love this product very match. Why? Because, I have acouple reasons for that. . First one- this Hand Grip was made without any movingparts on it, like on my old device, which had all the time moving foam part. Foam wasloosing and pushing an other small part, make it to fall down on the floor(sometimes, I had a problem to find it, and fix again, and again. . )And the second reason:insteadfirst Hand Grip, this one is adjustable. I can change resistance of spring between10 to 40 kg, as well. . So, now, I have a choice- or, to have my exercise longer, bymaking smaller resistance, or bigger, for using a maximum power in the short periodof time. So, as for me, it is good product(I bought it with discount, and using voucher)Highly recommend this product.
I feel really sore in my abdomen, but I know it's starting to work out. I find a good way to put it in the living room and practice while watching TV, so I can distract my attention and make it take a little longer. Develop perfect abs faster. At first I only practiced for ten minutes a day.
I love the thumb holes, the Velcro is really nice and doesn’t seem to snag any of my sweaters. Really like so many things about it and I don’t have any complaints yet. It very comfortable and warm.
I use this bag for overnight stays or if I have a lot to take with me. It's wonderful. It's comfortable to wear and is really durable. I've used it for clothes, books, my computer. . It's all great. The inside pockets are exactly what you need and the outside pocket is extremely handy. This is a great backpack for any use. Great bag with a ton of room.