# 9/16” x 21” Simpson Strong-Tie SDS-max Drill Bit

> Simpson Strong-Tie SDS-max MDMX05621, 9/16” x 21” Shank Drill Bit. 2-Cutter Head Carbide Drill Bit, ideal for commercial construction use in concrete & masonry applications. Contractor-grade premium drill bit – now at Nail Gun Depot.

- **URL:** https://www.nailgundepot.com/simpson-strongtie-mdmx05621-sds-max-drill-bits
- **Breadcrumbs:** Home > 9/16” x 21” Simpson Strong-Tie SDS-max Drill Bit
- **SKU:** MDMX05621
- **Brand:** Simpson Strong-Tie
- **Price:** 64.16 USD
- **Availability:** InStock

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SKU#: MDMX05621
BOX COUNT: 1

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![9/16” x 21” Simpson Strong-Tie MDMX05621 SDS-max Drill Bits](https://www.nailgundepot.com/media/catalog/product/2/c/2cutter_1_a_mdmx_prodpho_pho_prod_sds-maxdrillbit-2-cutter_c0.jpeg)

![9/16” x 21” Simpson Strong-Tie MDMX05621 SDS-max Drill Bits shank](https://www.nailgundepot.com/media/catalog/product/s/d/sds_max_shank_detail_image2_a_sdsmaxshank_featclospho_pho_prod_sdsmaxshankdetail_c0_1_1.jpeg)

![9/16” x 21” Simpson Strong-Tie MDMX05621 SDS-max Drill Bits head](https://www.nailgundepot.com/media/catalog/product/a/_/a_mdpl-mdplr-mdmx-mdb-mdbr-mdsp_featclospho_pho_prod_2-cutter-head-detail_c0_30.jpeg)

### $64.16

#### COMPATIBLE FASTENERS

[###### 3/8” x 13” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx03713-sds-max-drill-bits)

[**SKU#: MDMX03713**](https://www.nailgundepot.com/simpson-strongtie-mdmx03713-sds-max-drill-bits)

Qty/Box: 1

#### $43.87

[###### 1/2” x 13” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx05013-sds-max-drill-bits)

[**SKU#: MDMX05013**](https://www.nailgundepot.com/simpson-strongtie-mdmx05013-sds-max-drill-bits)

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#### $45.24

[###### 1/2” x 21” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx05021-sds-max-drill-bits)

[**SKU#: MDMX05021**](https://www.nailgundepot.com/simpson-strongtie-mdmx05021-sds-max-drill-bits)

Qty/Box: 1

#### $58.48

[###### 9/16” x 13” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx05613-sds-max-drill-bits)

[**SKU#: MDMX05613**](https://www.nailgundepot.com/simpson-strongtie-mdmx05613-sds-max-drill-bits)

Qty/Box: 1

#### $46.97

## PURCHASED TOGETHER

[**SKU#:MDMX06821Q**](https://www.nailgundepot.com/simpson-strongtie-mdmx06821q-sds-max-drill-bits)

[11/16” x 21” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx06821q-sds-max-drill-bits)

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## **$77.92**

[**SKU#:MDMX08121Q**](https://www.nailgundepot.com/simpson-strongtie-mdmx08121q-sds-max-drill-bits)

[13/16” x 21” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx08121q-sds-max-drill-bits)

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## **$93.92**

[**SKU#:MDMX10021Q**](https://www.nailgundepot.com/simpson-strongtie-mdmx10021q-sds-max-drill-bits)

[1” x 21” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx10021q-sds-max-drill-bits)

Box count: 1

## **$73.29**

[**SKU#:MDMX05613**](https://www.nailgundepot.com/simpson-strongtie-mdmx05613-sds-max-drill-bits)

[9/16” x 13” Simpson Strong-Tie SDS-max Drill Bit](https://www.nailgundepot.com/simpson-strongtie-mdmx05613-sds-max-drill-bits)

Box count: 1

## **$46.97**

#### PRODUCT OVERVIEW

The Simpson Strong-Tie SDS-max Shank Drill Bit MDMX05621 9/16” x 21” with 2-Cutter head is the premium quality, professional-grade tool to best suit your pre-drilling concrete & masonry needs. The SDS-max drill bit includes a variety of new features that enhance its durability and drilling speed, while improving the ease of use. Professionals appreciate the centering tip featured on most SDS-max bits that facilities easy spot drilling. Product quality and bit life is extended on this premium tool by its chromium-nickel-molybdenum steel alloy body and uniformly brazed carbide inserts.

Manufactured with strength and durability, SDS-max drill bits have a strong resistance to bending forces and wear, as they’ve been heat-treated with a shot-peened finish. The finish on these bits simultaneously increases drilling speed and surface hardness as well. Ease of use is amplified with a chisel-shaped head that easily penetrates material. The 4 x 90° head geometry crushes through rebar to prevent sticking in concrete. You’ll find this bit highly efficient as its patented, high-volume, multi-flute spiral quickly channels concrete dust from the hole, improving drilling speed upon use. This compatible bit fits all current and older SDS-max rotohammers from Black & Decker, Bosch, DeWalt, Hitachi, Hilti, Kango, Makita, Metabo and Milwaukee. Drill with confidence as this product conforms to ANSI Standard B212.15. The SDS-max bit comes as a box quantity of 1. Order today from Nail Gun Depot.

SPECIFICATIONS

**Resources**

**[Installation Information](https://ssttoolbox.widen.net/view/pdf/th3x3qrmwx/C-A-2023-p223.pdf?t.download=true&u=jjvoyi%20class=file%20file--pdf)**

**Box Count**
1

**SKU**
MDMX05621

**UPC**
707392476207

**Fastener Length**
21"

**Application Type**
Concrete

**Brand**
Simpson Strong-Tie

**Condition**
New

**Tool Compatibility**
SDS-max Rotohammers

**Fastener Treatment**
Shot-peened

**Fastener Shank Diameter**
9/16"

**Product Color**
Silver

**Fastener Material**
Steel Alloy

**Fastener Head Type**
2-Cutter Head

**Rating/Certification Provided**
ANSI Standard B212.15

**Fastener Shank Type**
SDS-max

**Manufacturer's Warranty**
Limited

**Item Length**
21"

**Model**
SDS-max Drill Bits

**Product Type**
Carbide Drill Bits

**Special Offer**
No

#### QUESTIONS & ANSWERS

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#### REVIEWS

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#### TECHNICAL RESOURCES

**[Installation Information](https://ssttoolbox.widen.net/view/pdf/th3x3qrmwx/C-A-2023-p223.pdf?t.download=true&u=jjvoyi%20class=file%20file--pdf)**

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_Source: [Nail Gun Depot](https://www.nailgundepot.com/)_
_Generated: 2026-10-20T01:33:46.645Z_