Hammer Drill Bosch GBH 2-21 Professional 720W SDS Plus, 2.1cm, 2J

The Bosch GBH 2-21 Professional is a 720W SDS Plus hammer drill engineered for drilling in concrete and masonry up to 2.1 cm diameter. Combining 2 J impact energy with an impact rate up to 4,800 bpm, this compact hammer drill delivers steady percussion power for holemaking and light chiselling tasks. At approximately 2.3 kg and with a narrow 88 mm housing width, the tool supports comfortable handling and good access in confined work areas. The model uses mains AC power and retains a simple, service-oriented layout for routine on-site use.

Advantages

The SDS Plus chuck enables rapid bit changes and secure bit retention for repetitive drilling jobs in concrete and brick. A high impact rate paired with 2 J impact energy balances drilling speed and control, reducing dwell time when creating holes for anchors and fixings. Its compact dimensions and relatively low weight minimize user fatigue during extended use, while the robust housing and practical grip surfaces support stable operation. The mains-powered design ensures consistent torque and power output for continuous work.

Suitable for

• Drilling holes in concrete and masonry for anchors and dowels (up to 21 mm)
• Installing electrical boxes and conduit in solid walls
• Medium-duty renovation and construction tasks
• Trade professionals and advanced DIY projects requiring reliable percussion drilling

Key specifications

• Motor power: 720 W
• Impact energy: 2 J
• Maximum drilling diameter in concrete: 21 mm
• Impact rate: up to 4,800 bpm
• Chuck type: SDS Plus
• Weight: 2.3 kg (approx.)
• Housing width: 88 mm; depth: 334 mm
• Power source: AC (mains)
• Colour: red, blue, black

How to use

Fit an appropriate SDS Plus drill bit for concrete and secure it in the chuck until it clicks. Mark the drilling position and use a center punch or pilot mark if needed. Hold the tool firmly with both hands, align the bit perpendicular to the surface and start drilling at a low speed to establish the hole; then increase to working speed. Apply steady, moderate pressure—let the hammer action and bit cutting do the work rather than forcing the drill. For deeper holes, periodically withdraw the bit to clear dust. Disconnect from mains power before changing bits or performing maintenance.

Recommendations

Use appropriate personal protective equipment including eye protection, hearing protection and dust mask when drilling into concrete. Select SDS Plus carbide-tipped bits sized for the required anchor or fixing; for repeated or heavy work consider using fresh or properly sharpened bits to maintain efficiency. Allow the motor short pauses under heavy continuous load to avoid overheating and follow local regulations for dust control when drilling in occupied spaces.