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Bosch T3921SC 4 -3/8 in. Carbide SDS-Plus SPEEDCORE Thin-Wall Core Bit for Removal of Masonry, Brick and Block
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Return this item for free
Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
Learn more about free returns.- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Material | Carbide |
Finish Type | Titanium |
Shank Type | SDS |
Brand | BOSCH |
Item Dimensions LxWxH | 4.44 x 4.44 x 5.63 inches |
About this item
- VERSATILE: Ejector hole delivers core removal of masonry, brick, and block
- LONGEVITY: Features tungsten carbide teeth for long-life
- IDEAL FOR: For use with SDS plus rotary hammers, corded and cordless hammer drills; use on rotary mode only
- USE WITH: Works with Bosch SPEEDCORE SDS-plus pilot bits and extensions
- CONVENIENT: Pilot bit is integrated with mandrel
Frequently bought together
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Product details
- Is Discontinued By Manufacturer : No
- Product Dimensions : 4.44 x 4.44 x 5.63 inches; 1.08 Pounds
- Item model number : T3921SC
- Department : Unisex Adult
- Date First Available : March 9, 2012
- Manufacturer : Bosch
- ASIN : B007IS0200
- Country of Origin : Germany
- Best Sellers Rank: #98,016 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement)
- #155 in Rotary Hammer Drill Bits
- Customer Reviews:
Product Description
Bosch SDS-Plus rotary hammer core bits are designed for core drilling with smaller hammers; rotary hammers, and corded and cordless hammer drills. Use on rotary mode of your tool to prevent core breakage. Core bits are sold separately and still need the Center Pin, Guide Plate and Shank to get the most out of your bit. Bosch coring bits are made for through hole drilling applications in masonry and concrete.
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From the manufacturer
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers like the speed and quality of the drill bit. For example, they say it's a great product that can cut through masonry really fast and makes clean holes. Customers are also impresseded with the value, saying it'll make a perfect hole through concrete. One downside is the ease of removal, with customers complaining that it'd be difficult to remove the speed core and extension bits after use.
AI-generated from the text of customer reviews
Customers are satisfied with the quality of the drill bit. They mention that it works well, has no frustration, and does not jam up. Some say that it is a great tool and works well with a hole saw bit. Overall, customers are happy with their purchase and recommend it to others.
"...Worked great! I placed the vent in a smaller stone as requested against my caution that it might rip it apart since it was so small...." Read more
"...Worked great! I placed the vent in a smaller stone as requested against my caution that it might rip it apart since it was so small...." Read more
"Good tool" Read more
"Nicely made part as are almost all Bosch products...." Read more
Customers like the cutting speed of the drill bit. For example, they say it's durable, and it cuts through masonry really fast. Some mention that it'll cut through brick like butter. That said, some are happy with the speed. One downside is that it can be dusty.
"...It cut through it perfectly. I had to use some sds chisels to pop out the core so I could keep coring...." Read more
"...It cut through it perfectly. I had to use some sds chisels to pop out the core so I could keep coring...." Read more
"Cuts through brick like butter. That said, it wont make it all the way through the thickness (width) of a brick one pass. It is not deep enough...." Read more
"It cuts clean holes & holds up well. Cuts twice as fast if you use water" Read more
Customers like the value of the drill bits. They say it's a great product and an easy recommended buy.
"...But for lighter-duty use, this bit does the trick at a great price." Read more
"Can't beat Bosch for concrete buts. 5 stars! And the price is lower than the local supply house, I'll buy more when these eventually wear out...." Read more
"Very good product and good pricing" Read more
"This is not a real tool. I bought this for home use but use good ones at work. The difference is dramatic. Don't buy the Bosch core saws...." Read more
Customers are satisfied with the hole that the drill bit makes. They mention that it is able to make a nice hole through concrete. Some customers also say that the tool is rotary hammer and it drilled a beautiful smooth walled hole.
"...was made with quartz stone so the bit is no longer usable but the hole was perfect. For the cost can’t do better...." Read more
"Did exactly what it is supposed to do, and that's make a nice hole through concrete...." Read more
"...I used a Cheap China Tools rotary hammer, and it drilled a beautiful smooth walled hole that had just enough clearance for 4" vent pipe...." Read more
"Very nice tool. It allowed me to open a perfect hole thru a 8" thick poured wall 40 year old." Read more
Customers like the appearance of the drill bit. They say it looks professional when completed, and the bit still looks brand new.
"...THe cut was very clean, and slightly larger than 4 3/8. I'm very happy with this bit...." Read more
"...After three cores the bit looks brand new. I’m sure it performs well in concrete or CMU also, but for soft brick it was perfect." Read more
"Excellent quality, made job easy and looks professional when completed." Read more
Customers find the removal of the drill bits difficult. They mention that the screws may be difficult to remove after use, and there is no information on the removal process. They also say it's difficult to separate the speed core and the extension bits after use.
"...There is no info on removal process to help advise how to do it easily. Otherwise, I would have given this 5 stars." Read more
"...The extension easily screws on, however, may be difficult to remove after use...." Read more
"Extremely difficult to separate speed core and the extension bits after use. How to use two monkey wrenches . That's only after 1 hour use" Read more
"Thread do not fit exactly...is realy hard to unscrew it, if you want to change the core bit.Every time I need to use a vise and a big wrench." Read more
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I was thinking about renting a more powerful drill from Homedepot but they didn't have long enough drill bit plus it even if they did I will cost me almost the same amount of money for only one hole.
It worked great so far no complains. If it lasts a few more holes then it definitely worth the price.