diff --git a/build.py b/build.py
index 8d25f18..a09eee3 100644
--- a/build.py
+++ b/build.py
@@ -22,6 +22,8 @@ with BuildPart() as mop_scraper_holder:
             Line(mop_arc @ 0, scraper_arc @ 0)
             Line(mop_arc @ 1, scraper_arc @ 1)
 
+            screw_pos = scraper_arc @ 0.5
+
         make_face()
 
         mop_arm = CenterArc((0, (mop_diameter + center_thickness) / -2), mop_diameter / 2, 90 - (mop_arc_size / 2), mop_arc_size)
@@ -32,9 +34,13 @@ with BuildPart() as mop_scraper_holder:
         offset(scraper_arm, amount=arms_thickness, side=Side.LEFT)
         make_face()
 
-    extrude(amount=clamp_length)
+    extrude(profile.sketch, clamp_length / 2)
+    extrude(profile.sketch, -clamp_length / 2)
 
     fillet(mop_scraper_holder.edges().filter_by(Axis.Z), 2)
 
+    with Locations(Plane((screw_pos.X, screw_pos.Y, 0)).rotated((-90, 0, 0))):
+        CounterBoreHole(3 / 2, 5.6 / 2, 3.2)
+
 assert mop_scraper_holder.part is not None
 export_step(mop_scraper_holder.part, "mop_scraper_holder.step")