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Description
Simpson Strong-Tie MDMX08121Q (13/16" x 21") SDS-max Shank Quad-Head Drill Bit for Concrete DrillingSimpson Strong Tie MDMX08121Q Description The SDS max Shank Quad Head Drill Bit is designed for efficient and durable drilling in concrete and masonry. Featuring a 13 16 inch diameter and 21 inch length, it is ideal for heavy duty applications. Simpson Strong Tie MDMX08121Q Includes (1) SDS max Shank Quad Head Drill Bit Simpson Strong Tie MDMX08121Q Features Uniformly brazed carbide inserts for longer bit life Centering tip for easy spot drilling
Simpson Strong-Tie MDMX08121Q Description
The SDS-max Shank Quad-Head Drill Bit is designed for efficient and durable drilling in concrete and masonry. Featuring a 13/16-inch diameter and 21-inch length, it is ideal for heavy-duty applications.
Simpson Strong-Tie MDMX08121Q Includes
- (1) SDS-max Shank Quad-Head Drill Bit
Simpson Strong-Tie MDMX08121Q Features
- Uniformly brazed carbide inserts for longer bit life
- Centering tip for easy spot drilling
- Chromium-nickel-molybdenum steel alloy body for durability
- Heat-treated and shot-peened finish for increased hardness
- Conforms to ANSI Standard B212.15
- Chisel-shaped head for efficient material penetration
- Patented multi-flute spiral for improved drilling speed
- 4 x 90° head geometry for rebar penetration
Simpson Strong-Tie MDMX08121Q Applications
- Concrete drilling
- Masonry applications
- Reinforced concrete drilling
Simpson Strong-Tie MDMX08121Q Specifications
| Diameter | 13/16 in. |
| Length | 21 in. |
| Drilling Depth | 17 in. |
| Shank Type | SDS-max |
| Head Type | Quad Head |
| Material | Hardened Steel |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 9 reviews
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Product Reviews
★★★★★ 5
Great ankle socks that stay put at a great price!!
Size: 6-9, Color: Assorted
These are great! I have been looking for a low profile ankle sock that is thinner but doesn’t ride down. (Picky, right?) I try to walk 5-7 miles on my days off. So it’s very important for me to not have to stop every couple of hundred yards, bend down, fix socks, then continue on my way while grumbling about NOT GREAT socks. These are not those socks. They really do stay put!!! And enough cushion to be comfortable also. So definitely a repeat!!
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Reviewed in the United States on December 2, 2018
★★★★★ 5
Great quality, no holes or fading!
Size: Medium, Color: Black/Assorted
I purchased these socks a couple years ago and love them so much that I just recently purchased them again! They fit perfectly, don't make my feet sweaty, and hit the ankle at the right spot. The material is so good that over years they have not faded and even though I wear the same few pairs every day, they have no signs of thinning or holes! These are the ONLY socks that I buy. I have the black ones as well as the multi-colored ones. I will never buy another brand or style again!
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Reviewed in the United States on January 11, 2020
★★★★★ 5
Cute under armor socks
Size: Medium, Color: Black/Assorted
There's no show under armour socks.Are perfect for anybody who likes thinner socks. I loved them, I love the design the colors and the comfort and fit. Hylie recommend to those of you who like thinner socks.
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Reviewed in the United States on October 22, 2024
★★★★★ 4
Well made and perform well, a little constricting
Size: Medium, Color: Black Assortment (6-pairs)
These socks definitely keep most of the moisture away from my feet, even in wet conditions, which is why I bought them. I am diabetic, though, and the recommendation is to wear socks that don't constrict at any point. These have a tight band around the opening that while it is not uncomfortable on, leaves a mark when I take them off. So far it's been ok, but if you have any kind of swelling in your feet or ankles these would probably not be the best. My foot measures size 8 and I wear size 9 Brooks running shoes. The socks fit me just right but based on the size of the opening and the overall length, I wouldn't think they would fit anyone more than a size larger. Overall well made and perform well as you would expect from this brand.
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Reviewed in the United States on July 20, 2018
★★★★★ 5
long lasting!
Size: Medium, Color: Black/Assorted
literally my favorite sock i will buy forever. they just started busting through after 6 years and i wear them a lot
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Reviewed in the United States on November 13, 2025