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Montolit Diamond Countersink Bit - Tile ProSource

Montolit Diamond Countersink Bit

by Montolit
SKU FPS75IN
Save 25% Save 25%
$223.13
$121.27 - $223.13
$223.13
$167.35
$121.27 - $167.35
$167.35
Size: 1-3/8" to 3"

Smooth, chamfered holes that won't crack later. The Montolit Mondrillo FPS is a diamond tapered end mill that cleans up and bevels the edge of an already-drilled hole — relieving the stress points in porcelain, ceramic, and glass that turn into cracks down the road. It refines the hole; it doesn't drill it.

More Details

A diamond tapered end mill (Mondrillo FPS) for chamfering and finishing drilled or cut holes in tile.

  • Purpose: Chamfers and smooths the edges of existing holes — it is a finishing tool, not a drilling bit
  • Why it matters: Relieves internal stress around a hole to prevent the cracking and chipping that rough edges cause
  • Materials: Porcelain, ceramic, and glass
  • Use after: Core drilling or cutting, to clean up and strengthen the opening
  • Result: A clean, beveled hole that looks finished and holds up under hardware
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Montolit Mondrillo FPS Diamond Tapered End Mills for Countersinking Holes

The Montolit Mondrillo FPS Diamond Tapered End Mills for Countersinking Holes are specialized finishing tools engineered to improve the strength and appearance of existing tile penetrations. Designed to chamfer and smooth the edges around drilled or cut holes, these diamond-tapered end mills relieve internal stresses in materials like porcelain, ceramic, and glass — which are prone to cracking or chipping when left rough after core drilling or cutting. 

These tools aren’t meant to drill holes; instead, they work by refining the circumference of a completed opening, reinforcing the edge profile and creating a clean transition that reduces the chance of breakouts under tension or load. Whether you’re working around plumbing fixtures, LED cutouts, or other exposed applications, the Mondrillo FPS gives tile pros a reliable way to achieve cleaner, stronger, more professional hole edges. 

Ideal for applications such as plumbing penetrations, electrical cutouts, and exposed tile openings, the Montolit Diamond Countersink Bit delivers consistent performance across hard materials while maintaining clean, professional results.

Why Tile Pros Choose It

  • Stress relief and smoothing: Refines hole edges to reduce cracking and chipping.

  • Not a drill bit: Specifically designed to finish and strengthen existing holes.

  • Works on hard materials: Ideal for porcelain, ceramic, and glass tile.

  • Dry or wet use: Adaptable to jobsite preferences and material conditions.

  • Professional edge quality: Improves finish around exposed openings.

  • Made in Italy: Precision engineering for reliable tile finishing performance.

Explore more professional tile finishing tools here: Diamond Chamfer Tools Collection