Stretcher Jaw set complete. Jaws are fully hardened and made from 4140 alloy steel. Can be used on most other brands of shrinker/stretchers. Our jaws are 1.730 W X 1.00 Thick" if your machines jaws are larger, our jaws most likely will not work. Also offered with complete jaw set plus (2) jaw retainer stampings ( SH01-40S) that fit our SH01 & SH02 series machines. Proudly, Made in Michigan