diff --git a/src/components/three/SmartMeasure.ts b/src/components/three/SmartMeasure.ts
index a7075ba..c5a8df5 100644
--- a/src/components/three/SmartMeasure.ts
+++ b/src/components/three/SmartMeasure.ts
@@ -189,7 +189,7 @@ export function detectHoleAtFace(
 }
 
 /** Kasa circle fit: returns { cx, cy, radius } in the input coordinate system */
-function circleFitKasa(points: { u: number; v: number }[]): { cx: number; cy: number; radius: number } | null {
+export function circleFitKasa(points: { u: number; v: number }[]): { cx: number; cy: number; radius: number } | null {
   const n = points.length;
   if (n < 3) return null;