Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Bosch CO21 21-Piece Cobalt Drill Bit Set with Durable Case Split-Point Tip Three-Flat Shank Stainless Steel Cast Iron Titanium Aluminum Wood PlasticProfessional Grade Cobalt Drill Bit Set for Demanding Applications The Bosch CO21 21 Piece Cobalt Drill Bit Set is engineered for contractors, tradespeople, and DIY enthusiasts who demand precision, durability, and superior performance. Designed to deliver 4X longer life than standard high speed steel bits, these cobalt drill bits excel in tough materials such as stainless steel, cast iron, titanium, and high density metals. They also provide reliable
Professional-Grade Cobalt Drill Bit Set for Demanding Applications
The Bosch CO21 21-Piece Cobalt Drill Bit Set is engineered for contractors, tradespeople, and DIY enthusiasts who demand precision, durability, and superior performance. Designed to deliver 4X longer life than standard high-speed steel bits, these cobalt drill bits excel in tough materials such as stainless steel, cast iron, titanium, and high-density metals. They also provide reliable results in light-gauge metal, wood, and plastic, making them a versatile addition to any toolbox.
Featuring a split-point tipthree-flat shank design
Key Features
- Manufactured from cobalt for maximum strength and durability
- 4X longer life compared to standard high-speed steel drill bits
- Split-point tip prevents skating and ensures precise starts
- Three-flat shank design improves grip and reduces slippage
- Handles high drilling temperatures for superior performance in stainless steel
- Laser-etched markings for quick and easy bit identification
- Versatile use across stainless steel, cast iron, titanium, aluminum, wood, and plastic
- Durable storage case included for organization and portability
What's Included
- (2) - 1/16" Bits
- (2) - 5/64" Bits
- (1) - 3/32" Bit
- (1) - 7/64" Bit
- (2) - 1/8" Bits
- (1) - 9/64" Bit
- (1) - 5/32" Bit
- (1) - 11/64" Bit
- (2) - 3/16" Bits
- (1) - 13/64" Bit
- (1) - 7/32" Bit
- (1) - 15/64" Bit
- (2) - 1/4" Bits
- (1) - 5/16" Bit
- (1) - 3/8" Bit
- (1) - 1/2" Bit
Specifications
| Bit Material | Cobalt |
| Bit Type | Twist |
| Case Included | Yes |
| Pieces | 21 |
| Shank Design | Three-Flat (on 3/16" and larger) |
| Tip Style | Split-Point |
| Markings | Laser-Etched Diameter |
| Performance Life | 4X Longer Than Standard HSS |
| Applications | Stainless Steel, Cast Iron, Titanium, Aluminum, Wood, Plastic |
| Temperature Resistance | High Drilling Temperatures |
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 1011 reviews
Sort
Product Reviews
★★★★★ 5
Very good for sublimation
Size: 8.5"x11"
Intact and very good for my sublimation
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 5
Great paper and beginner friendly
Size: 8.5"x11"
I Really like using this A-Sub paper
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 8, 2026
★★★★★ 4
Works
Size: 8.5"x11"
Works great for sublimation. Get plenty of sheets. Great value for the price. The paper is pretty thick and seems to hold a good amount of ink without smearing.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2026
★★★★★ 5
My go-to sublimation paper for crafting
Size: 8.5"x11"
I've used several sublimation papers, and this one has worked really well for my crafting projects. The colors transfer bright and vibrant, and the images come out crisp with good detail when using the proper sublimation printer and ink. The paper feeds smoothly through my printer and feels like a good quality weight—not too thin and not overly thick. I've used it for tumblers, keychains, and other sublimation projects, and I've been happy with the results. I also appreciate getting 110 sheets in one pack because it lasts a while, especially when working on multiple projects at once. Overall, this is a reliable sublimation paper that gives consistent results and is great for crafters or small business owners.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
★★★★★ 5
Escaping the Cartridge Trap: How This Refillable Powerhouse Completely Supercharged My Workflow!
For as long as I have been setting up home offices, the traditional ink cartridge has been my absolute greatest nemesis. There is nothing quite as frustrating as firing up a crucial document only to be met with that dreaded, blinking low-ink warning right when you are on a tight deadline. That is exactly why bringing the white Epson EcoTank ET-2903 Wireless All-in-One Color Supertank Printer into my workspace has been an absolute breath of fresh air. Finished in a clean, minimalist white, this machine completely bypasses the antiquated, expensive cartridge ecosystem. It looks incredibly sleek and modern sitting on my desk, blending seamlessly into my setup without projecting the bulky, industrial vibe of older, traditional machines. Right out of the gate, it feels like a highly engineered, premium piece of technology designed specifically to make daily document management drastically easier and far more efficient.
The sheer brilliance of this printer lies in its wildly innovative cartridge-free supertank architecture. Instead of swapping out tiny, expensive plastic squares every few weeks, this machine utilizes massive, front-facing ink reservoirs. Epson incredibly includes up to three years of ink right in the box, which equates to roughly eighty individual standard cartridges. Loading the ink is where the engineering truly shines; the proprietary EcoFit 522 ink bottles are uniquely keyed to their specific color slots, making it physically impossible to mix up the cyan, magenta, yellow, or black. The bottles automatically stop dispensing the exact moment the tank is full, ensuring a completely foolproof, zero-spill experience. Not only does this system save a phenomenal amount of money over the lifespan of the printer, but it also dramatically reduces the massive amount of plastic waste normally destined for landfills. Plus, being able to physically see exactly how much ink I have left at a mere glance provides unmatched peace of mind.
When it comes to putting ink on paper, this machine is an absolute powerhouse that consistently delivers remarkably crisp, professional-grade results. It reliably pushes out sharp, highly legible black text documents at a brisk 11 pages per minute, making quick work of dense contracts, shipping labels, and lengthy reports. The color performance is equally stunning, operating at 6 pages per minute to produce vibrant, perfectly saturated graphics and incredibly high-quality photo prints. The color accuracy is truly exceptional, giving life to presentations and flyers with punchy, true-to-life tones that never look washed out. Coupled with a highly convenient 100-sheet rear paper capacity, the entire printing process is incredibly smooth and uninterrupted. I am never bogged down constantly reloading the tray, allowing me to effortlessly maintain my momentum during demanding, high-volume workdays.
Beyond its spectacular printing capabilities, the built-in flatbed scanner and copier transform this unit into a comprehensive command center for all of my document needs. The scanner captures physical media with spectacular clarity and high-resolution detail, making the process of digitizing old tax records or preserving physical photographs incredibly easy and accurate. Navigating through all of these robust features is remarkably intuitive, thanks to the dedicated 1.44-inch color display located right on the front panel. The screen is bright, responsive, and paired with a highly logical button layout that allows me to initiate copies, execute scans, or perform quick maintenance tasks without ever having to boot up my laptop or dive into convoluted software menus.
The wireless connectivity is the final piece of the puzzle that makes this printer an absolute joy to operate on a daily basis. Equipped with high-speed Wi-Fi 4, it establishes a rock-solid connection to my home network that never drops or wavers. The smart mobile printing functionality is incredibly seamless; I can easily select a photo or document on my smartphone while lounging in the living room and have it instantly printing in the office down the hall. It completely untethers me from the desk, offering a level of modern convenience that I simply refuse to live without. The Epson EcoTank ET-2903 is a phenomenally capable, remarkably efficient, and incredibly fun machine to use. It entirely eliminates the stress and extortionate costs of traditional printing, delivering a flawless user experience that I cannot recommend highly enough for anyone looking to seriously upgrade their productivity game.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026