The Shaper Tools SG2-5CD Collet Kit is a router collet set built for users who need to run both imperial and metric cutter shanks without guessing or using adapters. This is a collet kit designed for matching router cutters to the correct collet size. Model number SG2-5CD. If you switch between different bit shank sizes, this kit matters because the right fit at the spindle is what helps the cutter run true and cut clean.

Instead of piecing together individual collets as needs come up, this kit gives you the core sizes in one case: 1/8 inch, 1/8", 1/4" (3, 6 mm), and 5/16" (8 mm). That covers the basic imperial and metric increments up to 1/4 inch and 5/16" (8 mm). For anyone doing detail routing, template work, sign making, inlay work, or general woodworking with mixed cutter sizes, that saves time and takes the guesswork out of setup.

The practical advantage here is simple: cutter and collet mismatches are bad news. A loose or approximate fit can hurt cut quality and put extra stress on the cutter and the workpiece. Shaper built this kit around proper fit instead of workarounds, which is the right call. If the shank size is 1/4" (6 mm), use the 6 mm collet. If the shank size is 1/4 inch, use the 1/4 inch collet. That sounds basic, but it is exactly the kind of detail that separates a clean pass from chatter, slip, or wasted material.

The kit also solves the storage problem that usually comes with small precision parts. Each set includes a Shaper Micro-Systainer with a customized foam insert, so the collets are protected, easy to identify, and not rolling around in a drawer. That matters more than it sounds. Collets are small parts, but they directly affect performance, and keeping them clean, organized, and easy to grab makes cutter changes faster on the bench or at the jobsite.

This is not a flashy accessory. It is a foundational one. If you already use Shaper equipment and want the flexibility to run more cutters correctly, this kit is the clean way to do it. It gives you proper imperial and metric coverage, avoids the compromises of aftermarket adaptors, and keeps the whole setup organized in one compact case.

Who should buy it? Woodworkers, cabinet installers, finish carpenters, furniture builders, and serious DIY users who work with multiple cutter shank sizes. If you mostly run one size bit all day, you may not need the full set. But if your work changes from project to project, the Shaper Tools SG2-5CD Collet Kit is the kind of accessory that pays off in better setup, fewer mistakes, and less messing around before the cut starts.

Shaper Tools SG2-5CD Collet Kit: Small Parts, Big Difference

This is the kind of accessory that does not get much attention until the day you need the exact collet size and do not have it.

• Who it's for: Woodworkers and Shaper users who run more than one cutter shank size and want the right setup every time.
• Why it stands out: You get both imperial and metric basics in one organized kit, plus a proper storage case instead of a pile of loose collets.
• Worth knowing: This is about precision and flexibility, not adding power. If you only ever use one shank size, the full kit may be more than you need.

• What sizes are included in this collet kit? It includes 1/8 inch, 3, 6, and 8 mm collets.
• Does this kit cover both imperial and metric cutter shanks? Yes. It includes both imperial and metric sizes.
• What is the largest size included? The largest imperial collet is 1/4 inch, and the largest metric collet is 5/16" (8 mm).
• Does the kit include storage? Yes. Each kit includes a Shaper Micro-Systainer with a customized foam insert.