diff --git a/dol/__init__.py b/dol/__init__.py
index c7afc1e0..277bcfc8 100644
--- a/dol/__init__.py
+++ b/dol/__init__.py
@@ -113,6 +113,7 @@ def ihead(store, n=1):
     chain_get,  # a function to perform chained get operations (i.e. path keys get)
     written_bytes,  # transform a file-writing function into a bytes-writing function
     written_key,  # writes an object to a key and returns the key.
+    read_from_bytes,  # transform a file-reading function into a bytes-reading function
 )
 
 from dol.trans import (
diff --git a/dol/filesys.py b/dol/filesys.py
index e6b98629..e128d61e 100644
--- a/dol/filesys.py
+++ b/dol/filesys.py
@@ -567,6 +567,22 @@ class TextFiles(FileStringPersister):
 json_bytes_wrap = wrap_kvs(obj_of_data=json.loads, data_of_obj=json.dumps)
 
 
+# And two factories to make the above more configurable:
+def mk_pickle_bytes_wrap(*, loads_kwargs: dict, dumps_kwargs: dict) -> Callable:
+    """"""
+    return wrap_kvs(
+        obj_of_data=partial(pickle.loads, **loads_kwargs),
+        data_of_obj=partial(pickle.dumps, **dumps_kwargs),
+    )
+
+
+def mk_json_bytes_wrap(*, loads_kwargs: dict, dumps_kwargs: dict) -> Callable:
+    return wrap_kvs(
+        obj_of_data=partial(json.loads, **loads_kwargs),
+        data_of_obj=partial(json.dumps, **dumps_kwargs),
+    )
+
+
 @pickle_bytes_wrap
 class PickleFiles(Files):
     """A store of pickles"""