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Description
Simpson Strong-Tie MDMX11221Q (1-1/8" x 21") SDS-max Shank Quad-Head Drill Bit for Concrete Drilling (1 Piece)Simpson Anchors MDMX11221Q Description The SDS max Quad Head Drill Bit is designed for efficient drilling in concrete and masonry, featuring a durable quad head design for enhanced performance. Simpson Anchors MDMX11221Q Includes (1) SDS max Quad Head Drill Bit Simpson Anchors MDMX11221Q Features Uniformly brazed carbide inserts for longer bit life Centering tip for easy spot drilling Chromium nickel molybdenum steel alloy body for extended service
Simpson Anchors MDMX11221Q Description
The SDS-max Quad-Head Drill Bit is designed for efficient drilling in concrete and masonry, featuring a durable quad-head design for enhanced performance.
Simpson Anchors MDMX11221Q Includes
- (1) SDS-max Quad-Head Drill Bit
Simpson Anchors MDMX11221Q Features
- Uniformly brazed carbide inserts for longer bit life
- Centering tip for easy spot drilling
- Chromium-nickel-molybdenum steel alloy body for extended service life
- Heat-treated and shot-peened finish for increased surface hardness
- Conforms to ANSI Standard B212.15
- Chisel-shaped head for efficient material penetration
- Patented high-volume multi-flute spiral for improved drilling speed
- 4 x 90° head geometry for rebar penetration and reduced sticking
Simpson Anchors MDMX11221Q Applications
- Concrete drilling
- Masonry drilling
- Reinforced concrete applications
Simpson Anchors MDMX11221Q Specifications
| Material | Hardened Steel |
| Shank Type | SDS-max Shank |
| Head Type | Quad Head4x Drill Bit |
| Diameter (in.) | 1 1/8 |
| Drilling Depth | 17 |
| Length (in.) | 21 |
| Packaging Qty. | 1 |
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
4.1 ★★★★★
Based on 23 reviews
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Product Reviews
★★★★★ 5
Great quality and price
Color: Grey, Size: King
We love these comforters! They are super comfy! Perfect weight. Not too thick or too thin! Great price!
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Reviewed in the United States on May 25, 2026
★★★★★ 4
Solid Affordable Duvet Insert Comforter
Color: White, Size: Queen
This is a great affordable all-season duvet insert comforter. There are multiple tie downs to attach to the duvet cover, not just the 4 corners. It is soft and washes well. It's plenty warm in the cold but might be too much during the hotter months. I live in San Diego where the average yearly temperature is at least 70 degrees. During the majority of the year this comforter ended up being too warm for me. I've used it for nearly 2 years but just replaced it with the much thinner Bedsure cooling comforter. If you're a hot sleeper or live in a warm climate, I'd recommend that product. This is still a good comforter, just not for me.
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Reviewed in the United States on March 30, 2026
★★★★★ 5
Must have!
Color: Light Grey, Size: Queen
⭐⭐⭐⭐⭐
This comforter is absolutely amazing! It feels like something you'd find in a luxury hotel—soft, lightweight, airy, and incredibly comfortable. It has quickly become one of the best purchases I've made. The quality exceeded my expectations, and it's perfect for staying cozy without feeling too heavy.
My kids love it so much that they're constantly trying to steal it from me! If you're looking for a comfortable, high-quality comforter, I highly recommend this one. You won't be disappointed!
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Reviewed in the United States on May 31, 2026
★★★★★ 5
Cozy, warm and not heavy
Color: White, Size: Queen
This blanket is great and for a fair price, so fluffy and it’s on the warmer side but not heavy, which is exactly what I wanted!
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Not Bulky, Not Too Warm
Color: White, Size: Twin
This is a great comforter. I have purchased others that were way too bulky. This one is perfect. It is lightweight and seems ideal for warmer temperatures. I am not too hot in the middle of the night. We are heading into Summer but I am sure this will be fine for Summer heat or for Air Conditioners.
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Reviewed in the United States on May 7, 2026