Bosch Bulldog Xtreme Rotary Hammer + Chisel Mortising Bit + 7-Piece Masonry Drill Bit Set












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Item #31527 |
Model #11255VSR
Robust 8.0 Amp rotary hammer – delivers 2.0 Ft-Lbs of impact energy with three modes of operation and rotating chisel lock
Vario-Lock positioning – rotates and locks chisel to optimize working angle
Variable-speed trigger with reversing – offers accurate bit starting
Integral clutch – disengages torque transmission if the bit gets into a bind-up scenario
Works with Bosch PRO+GUARD™ dust solutions – an end-to-end dust-collection system that helps users move toward OSHA silica table 1 dust compliance
Multi-function selector – three modes of operation: rotary hammer, rotation only and hammer only
Bosch-exclusive rotating brush plate — provides equal power in forward and reverse
HammerHook – allows quick tool storage during the job
D-handle design – ideal for overhead and downward drilling applications
General | |||
|---|---|---|---|
Color/Finish Family | Black | Chuck Type | SDS-plus |
Sub-Brand | Bulldog | Bare Tool | Yes |
Package Contents | Rotary Hammer, Auxiliary Handle, Depth Guide, Case | Main Handle Type | D-handle |
Handle Type | D-handle | ||
Dimensions | |||
|---|---|---|---|
Cord Length (Feet) | 8.0000 | Thru-hole Capacity (Inches) | 2.6250 |
Core Bit Capacity (Inches) | 2.6749 | Tool Height (Inches) | 4.75 |
Maximum Capacity Concrete (Inches) | 1.0000 | Tool Length (Inches) | 17.2500 |
Maximum Capacity Steel (Inches) | 0.5000 | Tool Weight (lbs.) | 6.7000 |
Maximum Capacity Wood (Inches) | 1.0000 | Tool Width (Inches) | 3.5000 |
Maximum Chuck Size | SDS-Plus | Battery Amp Hours | 8 |
Thin Wall Core Bit Capacity | Yes | Amperage | 8 |
Features | |||
|---|---|---|---|
Case Included | Yes | Keyed/Keyless | Keyless |
Charge Time (Minutes) | 0 | Maximum BPM | 5800 |
Chisel Lock Positions | Yes | Maximum RPM | 1300.0000 |
Cordless | No | Number of Batteries Included | 0 |
Electronic Speed Control | No | Operation Modes | Hammer; rotary hammer |
Forward and Reverse Switch Included | Yes | Side Handle Included | Yes |
Hybrid Capable | No | Variable Speed | Yes |
Impact Energy (Foot/lbs.) | 2 | Voltage (Volts) | 120.0000 |
Compatibility | |||
|---|---|---|---|
App Compatibility | No | Works with Android | No |
Bluetooth Compatibility | No | Works with iOS | No |
Wi-Fi Compatibility | No | ||
Warranty | |||
|---|---|---|---|
Tool Warranty | 1-year | Warranty | 1-year limited |
Certifications | |||
|---|---|---|---|
CA Residents: Prop 65 Warning(s) | No | Safety Listing | CSA safety listing |
Miscellaneous | |||
|---|---|---|---|
UNSPSC | 27112700 | ||
Ratings may include incentivized customer reviews.
What Customers Are Saying
The tool is powerful and versatile, excelling at drilling through concrete, brick, and other tough materials. Customers praise its performance, describing it as great, excellent, and a monster that can easily blast holes in concrete walls. Reviewers highlight the impressive power, speed, and durability, noting it can handle even the toughest jobs without slowing down or wearing out. The vibration control and lightweight design are also appreciated, making it comfortable to use for extended periods. Overall, the tool is widely regarded as a top-quality hammer drill that delivers outstanding results, especially for concrete and masonry applications.
Customer review summary generated by AI, including incentivized reviews.works great
I was struggling to take out part of a concrete step drilling holes and using splitting wedges. Lots of prying with the wrecking bar and pounding on it with the sledge hammer. Progress was really slow so I bought one of these including the demolition chisel and a 4-cutter bit. Wow! This thing went through the concrete like it was butter and I drilled 1/2 holes in about 45 seconds. So much faster than my rotary drill! Wish I had gotten a tool like this years ago for drilling concrete and ...
Great product
This product seems very durable and handled the job great
Verified Purchaser
Works well
Works just as described. Really helped me finish a project I needed done.
Verified Purchaser
Good workin drill
A little to small for what I need but absolutely perfect product if it wasn’t for the job I have
Verified Purchaser
Great Product, Disappointing Quality
I'm a homeowner who bought this tool 1.5 years ago and have used for two different bathroom projects to break up tile - once when I first bought it and again this week for a second bathroom renovation. When it works, it's really great! Unfortunately in my case, today it started smoking and sparking in the motor compartment half way through our tile demo. Immediately stopped using it, looked up the warranty and sad to find out it's out of warranty (1 year warranty). Called Bosch and their cus...
From boschtools.com
Enjoyed Drilling Into Concrete!!!
I was installing a handrail on our front porch. I needed to drill into the concrete to secure the four posts. The house was built in 1991. I had a black and decker hammer drill, probably from 1991 as well, which I used on the first day of the installation. I had bought brand-new masonry bits to use. It took forever and alot of effort to drill eight holes. I was exhausted after it was done. My muscles ached! I felt like I was going to bend the bit from the amount of pressure I was using on the dr...
Worth the money
had to drill 5in 3/8 anchor holes for a 6x6 post, went the cheap route with a regular hammer drill and it was a nightmare! only got 3 inchs with one hole. bits got chewed up quick. bought this rotary hammer drill and got the job done in minutes, SDS is definitely the way to go.
Buy this!
Got the job done!
Verified Purchaser
Powerful concrete crusher
Very efficient
Verified Purchaser
Great hammer drill
Several possible adjustments from hammer, to hammer-drill to drill. Has sufficient power. Thought about a rechargeable battery version (Dewalt), but realized I'm not going to be that far from a power source when I use it.
Verified Purchaser










Hi there! I apologize for the experience you had with your 11255VSR Rotary Hammer. Your concern is not common for this tool. We'd like to help you wit...