Drill bit Dedra DED1577 — 20 mm steel bit for stone, terracotta, glass, ceramic

Dedra DED1577 — 20 mm steel drill bit designed for drilling in stone, terracotta, glass and ceramic. This single 20 mm bit is manufactured from steel to provide the strength needed when creating larger-diameter holes by hand or with a drill. It is intended for tasks where a robust cutting edge and stable drilling behavior are required, such as tile fitting, masonry penetrations and glass or ceramic installations.

Advantages

The steel construction offers durability and resistance to wear during repeated use on hard materials. Its 20 mm diameter enables efficient removal of material for clean, uniform holes. The bit’s geometry is adapted to work on brittle surfaces like ceramic and glass while still performing on denser stone and terracotta. Supplied as a single unit, the bit is convenient for replacement or use as a specialist tool for larger openings.

Suitable for

• Drilling holes in wall tiles and ceramic fixtures
• Masonry work requiring a 20 mm hole in stone or terracotta
• Creating openings in glass for fittings and fixtures (with appropriate support and low speed)
• DIY repairs and installations that need a large-diameter drill bit

Key specifications

• Diameter: 20 mm
• Material compatibility: stone, terracotta, glass, ceramic
• Construction material: steel
• Pack quantity: 1 piece

How to use

Select an appropriate drill and secure the workpiece to prevent movement. For glass and ceramic, support the area behind the hole and start at low drill speed with light pressure to avoid cracking; consider using masking tape over the drilling point to reduce surface chipping. For stone and terracotta, use steady moderate speed and apply consistent pressure, allowing the bit to cut without excessive force. Periodically withdraw the bit to clear dust and cool the cutting edge; for extended drilling sessions consider intermittent pauses to avoid overheating.

Usage recommendations

Use appropriate personal protective equipment: safety glasses, gloves and dust mask. When drilling glass or ceramic, use low speed and steady feed to minimize the risk of cracks. For best results on masonry, mark the hole, pilot with a smaller bit if necessary, and ensure the drill is suitable for hammer or rotary action depending on the substrate. Store the bit dry and clean to prevent corrosion.