Silverline Long Masonry Drill Bit 16mm 20mm or 24mm x 400mm

Silverline Long Masonry Drill Bit 16mm 20mm or 24mm x 400mm

Options:

DML16 (16mm),

DML20 (20mm),

DML24 (24mm).

Overview:

The Silverline Long Masonry Drill Bit 400mm is designed for deep drilling in tough materials such as concrete, masonry and stone. Available in 16mm (DML16), 20mm (DML20) or 24mm (DML24), it’s ideal when you need extra reach for fixing points, pipework pass-throughs and anchor holes. The copper-brazed tungsten carbide tip is made for durability and reliable cutting performance, while the hardened shank is built to cope with the impact forces produced by rotary percussion drills. A practical choice for both trade and DIY users tackling heavy-duty masonry drilling.

Key Features

• Long 400mm masonry drill bit for deeper holes

• Available sizes: 16mm, 20mm or 24mm

• Copper-brazed tungsten carbide tip for durability

• Hardened shank designed for rotary percussion drilling

• Suitable for concrete, masonry and stone

• Ideal for construction, installation and renovation tasks

Specifications

• Brand: Silverline

• Product Type: Long masonry drill bit

• Overall Length: 400mm

• Tip: Tungsten carbide (copper-brazed)

• Shank: Hardened for impact/percussion use

• Suitable For: Concrete, masonry, stone

• Options:

  • DML16: 16mm x 400mm

  • DML20: 20mm x 400mm

  • DML24: 24mm x 400mm

Applications

• Deep drilling into concrete and masonry

• Creating holes for anchors and fixings

• Drilling through walls for pipework and cabling

• Installation and renovation work requiring extra reach

• General building and construction drilling tasks

How to Use

• Select the correct diameter option for the fixing or clearance required

• Fit the bit securely into a suitable rotary percussion drill

• Mark the drilling point and start slowly to seat the tip accurately

• Drill steadily, clearing dust regularly to maintain performance

• Avoid forcing the bit—let the drill and carbide tip do the work

• For best results, use appropriate PPE and a dust extraction method where possible

Silverline Long Masonry 400mm Long Drill Bits – Key FAQs

• What materials is this drill bit suitable for?

  • It’s designed for drilling into concrete, masonry and stone, making it ideal for construction, installation and heavy-duty renovation work.

• What sizes are available?

  • This long masonry bit is available in 16mm (DML16), 20mm (DML20) and 24mm (DML24), all with a 400mm overall length.

• What does the tungsten carbide tip do?

  • The copper-brazed tungsten carbide tip is designed to stay sharper for longer and withstand tough drilling conditions in hard masonry materials.

• Can I use it with a hammer drill?

  • Yes, it’s designed for use with rotary percussion (hammer) drills, and the hardened shank helps handle the impact forces during drilling.

• Why choose a 400mm long drill bit?

  • The extra length is ideal for deeper holes, drilling through thicker walls, or reaching fixing points where standard-length masonry bits are too short.

• How do I keep drilling performance consistent?

  • Start slowly to position the tip, drill with steady pressure, and withdraw the bit occasionally to clear dust—this helps maintain cutting speed and reduces heat build-up.