Best in 7 days
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23
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Description
Bosch 21-in Masonry Drill Bit for SDS-Max DrillAccurate hole diameter ensured by placing wear mark at the tip Inclined side cutters for aggressive drilling Short head gets dust out fast and reduces heat build up Active centering tip for optimum guidance when drilling in concrete and reinforced concrete Extremely robust and aggressive solid tungsten carbide S cutters Features Series Name N A Type Rotary Bit Length 21 in Shank Size SDS max Shank Type SDS max Compatible Tool SDS max drill Set
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- Free Standard Shipping on $100+ Orders to the USA.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.1 ★★★★★
Based on 544 reviews
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Product Reviews
★★★★★ 5
Used it on HVAC ductwork did its job and stuck well
Model: 197mil 31 sqft Car Sound Deadening Mat
There was a lot of material in here for the money, so a decent value, I used it for some extra sound deadening on the ductwork in my house before finishing the basement, seems to help cut down the echoes coming through the ductwork. Overall the product was good had a few pieces where the sticky tore off the foam and stuck to the paper backing but all in all no complaints.
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Reviewed in the United States on April 2, 2026
★★★★★ 5
Exactly as described!! Easy installation.
Model: 197mil 31 sqft Car Sound Deadening Mat
Easily installed. Cut with regular scissors. Made a huge difference in interior noise.
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Reviewed in the United States on May 31, 2026
★★★★★ 4
A worthwhile addition to just butyl itself.
Model: 197mil 31 sqft Car Sound Deadening Mat
I used this as a topper to butyl sound deadening material on the floor and side panels and am very pleased. It was generally easy to use. It is very sticky and cannot be easily repositioned as the foam will separate from the sticky side if you try, but its not a big deal. I have yet to run the car but the panels are much quieter when tapped on vs just the butyl alone, and this stuff weighs almost nothing.
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Reviewed in the United States on February 17, 2026
★★★★★ 5
Good deadening
Model: 197mil 31 sqft Car Sound Deadening Mat
This sound deadening works well and has good adhesion .
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Easy to install and great value.
Model: 197mil 31 sqft Car Sound Deadening Mat
Very easy to cut and install with the rollers I bought separately. It adheres well even though I was installing it when the weather was closer to 40-50 degrees. Definitely helps to deaden the sound from the bare sheet metal.
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Reviewed in the United States on April 2, 2026
