Bosch Professional GBH 2-21 Hammer Drill: Compact power for concrete and masonry

Ten minutes after unboxing the Bosch Professional GBH 2-21 Hammer Drill you can tell this kit is aimed at people who need a robust SDS Plus hammer for everyday concrete and masonry tasks. Compact weight keeps arm strain down during longer runs, while the simple controls suit both trades and keen DIYers. Will it handle heavier demolition work on site?

⚡ At a Glance

• Hammering Performance: 720 W motor with 2.0 J impact energy for effective hammer drilling in concrete up to 21 mm
• Practical for: DIYers and tradespeople needing a compact, professional hammer drill for routine concrete, masonry and anchor work
• Points to consider for: A demolition contractor chiselling reinforced concrete overhead; the 720 W motor and 2.0 J impact energy will require more passes and slower progress compared with heavy-duty rotary hammers

SDS Plus hammer drill with a 720 W motor and 2.0 J impact energy. Supplied accessories include three SDS Plus drill bits, auxiliary handle, depth stop and a carrying case.

How 720 W Motor and 2.0 J Impact Energy Changes Drilling into Concrete

Direct Impact: The 720 W motor powers the SDS Plus mechanism while 2.0 J of impact energy fractures masonry efficiently, allowing the bit to advance through concrete for common anchor and fixing holes.

Fast, repeatable hole-making for anchor bolts and fixings, delivering clean results for routine site and home tasks.

The Compact 2.3 kg Design Advantage in Detail

User Scenario: At 2.3 kg, roughly the weight of a typical 15-inch laptop, the centre of mass sits close to the handle so operation stays balanced during overhead or awkward-angle work.

Reduced wrist fatigue and improved control in confined spaces; easy to carry between vans and ladders in the supplied case.

The Right Hole Every Time: Why Three Operating Modes Matter

Direct Impact: Three selectable modes — hammer drilling, rotary drilling and chiselling — match the action to the task, so masonry anchoring and light chiselling use the correct strike or rotation profile.

Versatile for fixing, hole-boring and light chiselling jobs around the home or site; mode switching is straightforward for quick task changes.

✨ The Standout Features of the Bosch Professional GBH 2-21 Hammer Drill

Three operating modes – Switch between drilling, hammering and chiselling without tool changes
SDS Plus system – Accepts standard bits for quick on-site bit swaps
Auxiliary handle and depth stop – Better control and consistent hole depth every time
Dust extraction compatibility – Keeps workspaces cleaner and reduces airborne dust

📋 Technical Details at a Glance

Power: 720 W
Impact energy: 2.0 J
Maximum concrete drilling diameter: 21 mm
Weight: 2.3 kg (roughly the weight of a typical 15-inch laptop)
Operating modes: Hammer drilling, drilling, chiselling

❓ Frequently Asked Questions

Q: What drill bits are supplied with the kit?

A: Supplied bits are SDS Plus 6 mm, 8 mm and 10 mm, which cover common anchor and fixing sizes; Pro-Tip: store the spare bits in the case to avoid interruptions between jobs.

Q: Which dust extraction systems are compatible?

A: Compatible systems listed are GDE 16 Plus, GDE 68 and GDE 165, enabling connection to common Bosch extraction heads; Pro-Tip: match the extraction shroud to masonry drilling to reduce airborne dust at source.

Q: What voltage does the tool require?

A: Rated for 230 V, matching UK mains supplies; Pro-Tip: use residual-current protection on site circuits for safer prolonged use.

🏆 Our Verdict

Suitable for DIYers and tradespeople who need a compact SDS Plus hammer for routine concrete, masonry and light chiselling. Balanced weight and the auxiliary handle make operation feel steady in the hand, and the gearbox clicks cleanly when switching modes, which gives confidence during repetitive work. Given the professional kit and compatibility with common dust extraction systems, the drill represents solid long-term value for frequent users.