Proma drill bit set model RB77849, 15-piece, for stone

Proma RB77849 is a 15-piece drill bit set designed specifically for drilling into stone. The set includes a range of masonry drill bits with a centring tip and round shank, supplied in a compact case with individually marked slots so the required diameter is easy to identify and retrieve. Pack dimensions are 150 × 105 × 46 mm, making the set convenient to store and carry for on-site assembly, repair and renovation tasks.

Advantages

The centring tip ensures accurate positioning and reduces wandering when starting a hole in stone surfaces. The round shank design allows secure insertion into the chuck of a drill or hammer drill. The compact case with labelled slots keeps drill bits organised, speeding up work and reducing time spent searching for the correct diameter. The assortment of diameters covers common requirements for masonry fixings and general stonework.

Suitable for

• Drilling through and blind holes in stone
• Installing anchors, dowels and screws in masonry
• Tile and stone installation, repair and renovation
• Furniture assembly that requires masonry fixings

Key specifications

• Quantity: 15 pieces
• Material / application: masonry drill bits for stone
• Shank type: round shank for drill chuck compatibility
• Tip design: centring tip for precise start and guidance
• Diameter assortment: 3 × 3 mm, 2 × 4 mm, 3 × 5 mm, 1 × 6 mm, 3 × 8 mm, 2 × 10 mm
• Pack dimensions: 150 × 105 × 46 mm

How to use

Select the drill bit with the appropriate diameter for the anchor or screw to be used and insert the round shank securely into the drill or hammer drill chuck. Position the centring tip on the marked drilling point and start drilling at low speed to establish the hole without wandering; increase speed and apply steady pressure suitable for the stone type. Clear dust from the hole periodically to maintain cutting efficiency and prevent overheating. Use drilling accessories and fixings sized to match the drilled diameter.

Usage recommendations

Wear appropriate personal protective equipment such as safety glasses and a dust mask when drilling stone. For harder stone types or thicker holes, use a hammer drill setting if available and allow the bit to cool between extended runs. Store the bits in the supplied case with the marked slots to preserve tip geometry and ensure quick selection on future jobs.