I use this Natty Dreads model on my M4 characters in Poser 12 and 13. (If you want to use this model in Poser, I use the Prop converter by Ken 1171_Designs https://www.renderosity.com/marketplace/products/153019/duf-prop-converter-for-poser-12 and Morph converter https://www.renderosity.com/marketplace/products/154285/duf-morph-converter-for-poser-12) The locks move well and render well. The model is very versatile.