This item is a product of IKA. It would certainly be suitable for grinding various sample types, including plat tissues. It is a powerful grinder capable of pulverizing relatively hard substances. This item has a 100W output and functions much like a food processor. The included blades for the harder substances, blades for soft materials must be ordered separately. There are two cups with capacities of 80 mL and 250 mL. See the image below for additional details.
Alternatively, a manual tissue grinder is also available. This product includes a pestle that forces tissues through a series of screens of decreasing mesh sizes. There is one cup with a volume of 85 mL. See the link below to review this product as well as the accompanying datasheet:
CD-1 Tissue Grinder:
https://www.sigmaaldrich.com/product/sigma/cd1
Datasheet:
https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/243/849/cd1pis.pdf