multiple spring Turkey

... almost always used in conjunction with a mating bolt to fasten multiple parts together. The two partners are kept together by a combination of their threads' friction, a slight stretching of the bolt, and compression of the parts to be held together. Washer is a thin plate (typically disk-shaped, but sometimes square) with a hole. Spring washers, which have axial flexibility and are used to...

...Intuitive design eliminates the need for aligning with axis of rotation. Angled pad fully supports the upper arm to eliminate unwanted shoulder movement.seat height adjust to accommodate user height. Rotating cambered handle provides multiple grip positions. Available with shock absorber spring assisted seat.