Drill bit Dedra WPQ0841, 8 mm diameter, for concrete, brick, stone, aerated concrete, 135° point, 1 pc

Dedra WPQ0841 is an 8 mm percussion drill bit designed for drilling holes in concrete, brick, natural stone and aerated concrete. The bit is supplied as a single piece and is intended for use with hammer drills, delivering accurate, clean holes for fastening, anchoring and installation work. A 135° point angle improves centring and reduces wandering when starting holes, which helps achieve precise results on masonry surfaces.

Advantages

The 135° point ensures stable positioning at the drilling start and reduces the need for pilot marks. Hardened cutting edges and a geometry adapted to percussion drilling provide resistance to wear in abrasive masonry materials. The compact 8 mm diameter makes the bit suitable for common fasteners and anchors while preserving drill control and minimizing breakage risk in brittle materials.

Suitable for

• Drilling holes for anchors and dowels in concrete
• Creating mounting points in brick and natural stone
• Working with aerated concrete for light-weight construction fixes
• General DIY and professional masonry tasks requiring 8 mm holes

Key specifications

• Diameter: 8 mm
• Point angle: 135° for improved centring
• Compatible drilling mode: Percussion/hammer drilling
• Suitable materials: Concrete, brick, natural stone, aerated concrete
• Package quantity: 1 piece

How to use

Select a hammer drill with an appropriate chuck capacity for an 8 mm shank and set it to percussion mode. Mark the drilling point on the masonry surface and, if necessary, use a centre punch to help start the hole. Begin drilling at low speed to locate the spot, then increase speed and maintain steady pressure—avoid excessive side forces. Periodically withdraw the bit to clear dust and prolong cutting edge life. For deep holes, drill in stages and clear debris between passes.

Usage recommendations

Use appropriate personal protective equipment including safety glasses, ear protection and a dust mask when drilling masonry. Match drill speed and feed pressure to the material: lower speeds and moderate pressure for dense or brittle stone, higher speeds and steady percussion for standard concrete. Replace the bit if cutting edges become rounded or if drilling efficiency decreases.