Batching assign permissions to all items separated from list permission settings. Let ITEM-RELATED users or groups have permissions to each item.

Features: SharePoint Item Permission Batch is used to modify all items permissions in a SharePoint list. SharePoint lists each item is assigned unique permissions on what each can do. If there is a need for modifying or adding some permission to any of these items, each item will have to be accessed to change permissions in the SharePoint setting. Whereas this add on can add or remove permissions in a batch. All items in a users/ groups or user/group SharePoint user needs to add/remove some permission, with default SharePoint permission setting, it is quite a tedious task to set item permission one by one.

With SharePoint Item Permission Batch, it is possible to add or remove permissions to users/groups or user/group field columns for all items. The user/group field column are columns which represent users/groups, including "Created By", "Modified By" etc. inner columns and other users/groups columns such as "Manager". Adding/removing permissions for all items in a list is possible. On the other hand if a unique permissions have been created for items of list can be done. Inherit permission from parent list permission when custom permission setting is unnecessary.

Overall: Very narrow functionality but implemented ok.