diff --git a/build.py b/build.py
index bdacd5e..446a178 100644
--- a/build.py
+++ b/build.py
@@ -12,6 +12,10 @@ def build_mop_scraper_holder(center_thickness: float):
 
     clamp_length = 30
 
+    screw_diameter = 4.75
+    screw_head_diameter = 9.6
+    screw_head_depth = 4
+
     with BuildPart() as mop_scraper_holder:
         with BuildSketch() as profile:
             with BuildLine():
@@ -40,7 +44,7 @@ def build_mop_scraper_holder(center_thickness: float):
         fillet(mop_scraper_holder.edges().filter_by(Axis.Z), (arms_thickness - 0.01) / 2)
 
         with Locations(Plane((screw_pos.X, screw_pos.Y, 0)).rotated((-90, 0, 0))):
-            CounterBoreHole(3 / 2, 5.6 / 2, 3.2)
+            CounterBoreHole(screw_diameter / 2, screw_head_diameter / 2, screw_head_depth)
 
     return mop_scraper_holder