diff --git a/boxes/generators/swwrenchholder.py b/boxes/generators/swwrenchholder.py
new file mode 100644
index 0000000..9eb942a
--- /dev/null
+++ b/boxes/generators/swwrenchholder.py
@@ -0,0 +1,97 @@
+#!/usr/bin/env python3
+# Copyright (C) 2013-2019 Florian Festi
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from boxes import *
+
+class SlottedEdge(edges.Edge):
+
+    def __call__(self, length, **kw):
+
+        n = self.number
+        t = self.thickness
+        
+        self.polyline(t, 45)
+
+        l = t
+        
+        for i in range(n):
+            w = self.min_width * ((n-i)/n) + self.max_width * (i / n)
+            s = self.min_strength * ((n-i)/n) + self.max_strength * (i / n)
+            if i == n-1:
+                self.polyline(w-s/2+2*s, (-180, s/2), w - 0.5*s,
+                              (180, s/2))
+                l += s *2 * 2**0.5
+            else:
+                self.polyline(w-s/2+2*s, (-180, s/2), w - 0.5*s,
+                              (180, s/2))
+                l += s *2 * 2**0.5
+        self.polyline(0, -45)
+        self.edge(length-l)
+
+class SlatwallWrenchHolder(Boxes):
+    """Hold a set of wrenches at a slat wall"""
+
+    ui_group = "SlatWall"
+
+    def __init__(self):
+        Boxes.__init__(self)
+
+        self.addSettingsArgs(edges.FingerJointSettings)
+        self.addSettingsArgs(edges.SlatWallSettings)
+
+        # remove cli params you do not need
+        self.buildArgParser(x=100)
+        # Add non default cli params if needed (see argparse std lib)
+        self.argparser.add_argument(
+            "--depth",  action="store", type=float, default=30.0,
+            help="depth of the sides")
+        self.argparser.add_argument(
+            "--number",  action="store", type=int, default=11,
+            help="number of wrenches")
+        self.argparser.add_argument(
+            "--min_width",  action="store", type=float, default=8.0,
+            help="width of smallest wrench")
+        self.argparser.add_argument(
+            "--max_width",  action="store", type=float, default=25.0,
+            help="width of largest wrench")
+        self.argparser.add_argument(
+            "--min_strength",  action="store", type=float, default=3.0,
+            help="strength of smallest wrench")
+        self.argparser.add_argument(
+            "--max_strength",  action="store", type=float, default=5.0,
+            help="strength of largest wrench")
+
+    def render(self):
+        # Add slat wall edges
+        s = edges.SlatWallSettings(self.thickness, True,
+                                   **self.edgesettings.get("SlatWall", {}))
+        s.edgeObjects(self)
+        self.slatWallHolesAt = edges.SlatWallHoles(self, s)
+
+        h = (self.number * (self.min_strength + self.max_strength) * 2**0.5 +
+             self.max_width)
+        t = self.thickness
+        x = self.x-2*t
+        
+        self.rectangularWall(self.depth, h,
+                             ["e", "B", "e", SlottedEdge(self, None)],
+                             move="right")
+        self.rectangularWall(self.depth, h,
+                             ["e", "B", "e", SlottedEdge(self, None)],
+                             move="right")
+        self.rectangularWall(x, h, "eDed",
+            # callback=[lambda:self.fingerHolesAt(x/2, 0, h, 90)],
+            move="right")