Bosch HC4C2122 3/4-Inch SDS-Plus Bulldog Tough Rotary Hammer Bit

Bulldog Tough: Bosch HC4C2122 is a 3/4-inch SDS-Plus rotary hammer bit with an 8-inch overall length and a four-cutter carbide head. Its centering tip and four-flute design are aimed at concrete drilling and anchoring holes, including work where the bit may encounter rebar.

At a glance

Four-cutter carbide head is presented for concrete drilling that may encounter rebar, with the design intended to help reduce jamming.
Centering tip is intended to help start anchoring holes accurately.
Four-flute design is described as pulling dust away from the hole.
Manufacturer claims up to 2X life in concrete with rebar versus its stated comparison bit. This is a claim, not an independently verified result.

Price

$20.60Save 21%

Reference price: ~~$25.98~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

SDS-Plus shank is specified for SDS-plus rotary hammers.
The centering tip and 3/4-inch diameter suit buyers planning anchoring holes in concrete.
The four-cutter head is designed to keep a cutting edge working when encountering rebar.

Technical specifications

15 specifications

Identity
Brand	Bosch
Model	HC4C2122

Dimensions and installation
Listed size	3/4 In. x 6 In. x 8 In.
Cutting diameter	0.75 inches
Usable length	6 Inches
Overall length	8 Inches
Shank type	SDS-Plus
Weight listed	7.84 ounces

Materials and design
Material listed	Carbide
Surface recommendation	Concrete
Cutting angle	120 degrees
Flute type	Parabolic
Number of flutes	4
Point style	Bulldog™
Finish type	Finish

What to know before buying

Listing details to confirm

The listing has inconsistent pack information: its title describes one bit, the included-components field says 1 Bit, while other fields call it a bit set and say 6 packs or 4 ct. Confirm the selected listing and quantity before ordering. The stated up-to-2X life claim uses differing comparisons across listing sections, so treat it as unconfirmed rather than a guaranteed outcome.

What’s in the box

Included

1 Bit

Who is it for?

A good fit for

Concrete and masonry workers needing a 3/4-inch bit for an SDS-Plus rotary hammer.
Electrical, plumbing, and general construction trades drilling anchoring holes in concrete.

Less suited to

Buyers whose rotary hammer does not use an SDS-Plus shank.
Buyers needing a different hole diameter or a longer usable reach than the listed 6 inches.

Bosch HC4C2122 3/4-Inch SDS-Plus Bulldog Tough Rotary Hammer Bit · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 363 ratings

5 stars79%79%
4 stars13%13%
3 stars3%3%
2 stars2%2%
1 star3%3%

Customer feedback highlights perceived good quality, effective concrete drilling, compatibility with concrete and value, while durability experiences are mixed: some customers report long life and others say the bit dulls quickly. That variability matters for buyers relying on it for repeated concrete work. The four-cutter carbide head is a product claim, not proof that every bit will last longer in use.

Positive themes

Customers describe the bit as good quality and say it works well in concrete.
Some customers consider it good value.

Negative themes

Some customers report that the bit dulls quickly.

Mixed feedback

Durability feedback varies, with some reporting long service and others faster dulling.

Frequently asked questions

What tools does this bit fit?

The listing specifies an SDS-Plus shank and says it is made for SDS-plus rotary hammers.

What are the listed dimensions?

The listing gives a 3/4-inch diameter, 6-inch usable length and 8-inch overall length.

Is this sold as a single bit or a multi-pack?

The title and component list indicate one bit, but other listing fields refer to 6 packs and 4 ct. Confirm the quantity shown for the selected listing.

Does the bit guarantee longer life in rebar concrete?

No. Bosch claims up to 2X life against stated comparison bits, but the comparison wording differs across the listing and the result is not independently verified.