HY-STAN Single Axis Child's knee with manual lock
https://www.atpsupply.org/shop/c-tk-1c1-hy-stan-single-axis-child-s-knee-with-manual-lock-5975
https://www.atpsupply.org/web/image/product.template/5975/image_1920?unique=68819b1
Optional lock
Quick & Easy adjustable mechanism
Light-weight alloy construction
