Head to head
Bosch Professional GBH 2-28 F vs Karcher K5 Power Control Flex
The Bosch Professional GBH 2-28 F is a corded sds-plus rotary hammer for drilling and light chiselling. The Karcher K5 Power Control Flex is a domestic electric pressure washer for patios, cars and outdoor cleaning.
Last reviewed 13 September 2026
Specifications side by side
| Bosch Professional GBH 2-28 F | Karcher K5 Power Control Flex | |
|---|---|---|
| Weight | 3.1 kg | 12.4 kg (without accessories) |
| Power input | 880 W | - |
| Impact energy | 3.2 J | - |
| No-load speed | 0-900 rpm | - |
| Impact rate | 0-4000 bpm | - |
| Chuck | SDS-plus | - |
| Max pressure | - | 20-145 bar |
| Max flow rate | - | 500 l/h |
| Area performance | - | 40 sq m per hour |
Sources: Bosch Professional GBH 2-28 F, Karcher K5 Power Control Flex. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the GBH 2-28 F if...
The GBH 2-28 F is a long-running corded SDS-plus hammer that hire desks and merchants keep in stock as a dependable, easily serviced drill for concrete and masonry. It suits users who want a mains tool that never needs charging over a cordless equivalent.
Full GBH 2-28 F specifications →Buy or hire the K5 Power Control Flex if...
The K5 sits in Karcher's mid-to-upper domestic range, bought outright by homeowners for regular patio, car and garden furniture cleaning rather than hired. It is frequently the model UK reviewers and retailers use as the benchmark domestic Karcher pressure washer.
Full K5 Power Control Flex specifications →Common questions
What is the difference between the Bosch Professional GBH 2-28 F and the Karcher K5 Power Control Flex?
The Bosch Professional GBH 2-28 F is a corded SDS-plus rotary hammer for drilling and light chiselling; the Karcher K5 Power Control Flex is a domestic electric pressure washer for patios, cars and outdoor cleaning.
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