Using the certain plasticity of cellulose, silk, wool and other fibers under humid conditions, the fabric width is gradually expanded to a specified size and dried and stabilized in a finishing process, also known as fixed size. After scouring, bleaching, printing and dyeing, the fabric stretches in the warp direction and shrinks in the weft direction. Tentering can reduce the deformation of the fabric during use. Tentering of wool fabric or its blended fabric can be carried out on a multi-layer reciprocating pin tenter. The tenter can also be used for drying fabrics, and can also be used for heat setting of synthetic fibers.