Introducing the ABC Co, biodegradable hemp grinder/hand muller. Perfect for the environmentally friendly Cannabis Consumer. These grinders are fabricated from all-natural, biodegradable materials and formed into a sleek, aesthetically pleasing but functional, and effective grinder/hand muller. Introducing the ABC Co, biodegradable hemp grinder/hand muller. Perfect for the environmentally friendly Cannabis Consumer. These grinders are fabricated from all-natural, biodegradable materials and formed into a sleek, aesthetically pleasing but functional, and effective grinder/hand muller.