The Milwaukee 48-28-1030 5-1/2 in. x 7/16 in. Universal QUIK-LOK Extension is a bit holder and extension designed for extending 7/16 inch shank accessories in drilling applications where extra reach and quick bit changes matter. This is a bit holder extension designed for drilling and accessory reach extension. Model Number: 48-28-1030. If you are running larger boring accessories and need a compact extension that does not slow you down, this is the piece that makes the setup more practical.

The main reason this extension matters is its universal QUIK-LOK interface. Milwaukee states it accepts all 7/16 inch shanks, including accessories with or without a power groove. In real use, that means less second-guessing about whether a particular bit will lock in properly. For electricians, plumbers, remodelers, and general contractors drilling repeated holes, that kind of compatibility saves time and cuts down on swapping between different holders.

The quick-change design is another real benefit on the job. Instead of stopping to mess with extra tools just to switch accessories, you can change bits quickly and keep moving. That is useful when you are drilling multiple hole sizes in framing, rough-in work, or general construction tasks where setup speed adds up over the course of the day.

Milwaukee also rates this extension for impact use, which is important because an extension takes stress from both the tool and the accessory. Combined with the hardened steel shank, the build is aimed at durability rather than just basic fit. If you are using it in tougher conditions or pairing it with heavy-duty drilling accessories, that added strength is the reason to buy a purpose-built extension instead of a lighter-duty adapter.

At 5-1/2 inches long, this extension adds reach without becoming awkward. It is long enough to help get past obstructions or work into tighter spaces, but still short enough to keep the setup manageable. The minimum chuck size required is 1/2 inch, so it is built around larger-capacity drills and similar tools that are meant to handle 7/16 inch shank accessories correctly.

Who should buy it? This Milwaukee 48-28-1030 5-1/2 in. x 7/16 in. Universal QUIK-LOK Extension makes the most sense for tradespeople and serious DIY users already working with 7/16 inch shank boring accessories and looking for more reach, quicker changes, and a tougher connection point. If your work involves repetitive drilling, rough-in, or large-hole boring and you do not want your extension to be the weak spot, this is the right kind of accessory.

Milwaukee 48-28-1030 Universal QUIK-LOK Extension Keeps Bigger Drilling Setups Moving

If you already run 7/16 inch shank accessories, this is the kind of extension that earns its place fast because it adds reach, changes over quickly, and is built for impact-rated work.

• Who it's for: Electricians, plumbers, remodelers, and contractors using larger boring accessories with 7/16 inch shanks.
• Why it stands out: Universal 7/16 inch shank acceptance, tool-free QUIK-LOK changes, and impact-rated durability in one simple accessory.
• Worth knowing: This is not for small-driver setups. You need a 1/2 inch chuck minimum, and the box includes the extension only.

• What shank size does this extension accept? It accepts all 7/16 inch shanks, including those with or without a power groove.
• Does this require tools to change bits? No. The QUIK-LOK design allows quick bit changes without extra tools.
• Is this extension impact rated? Yes. Milwaukee lists this extension as impact rated.
• What size chuck is required? A minimum 1/2 inch chuck size is required.