There are no materials/durability/bullet penetration, or anything of the sort in the item format, only colours. Almost everything is cuttable unless set Unbreakable in the properties.
It would be neat, but probably just not feasible. All powers are programmed in by myself, making a very customisable system in-game would be super complex.
 "Mutilate-a-Doll 2"){kind=icon}
More powers are coming in the "12 Days of Mutilation" December event. See the banner in the main menu on the left for info.