There are a lot of projects that demand an extra deep reach from the router bit. As a rule you want to have at least 7/8" of the shank in the collet, or as much as possible without letting the woodworking router bit bottom out. In some situations, installing the router bit properly into router doesn't offer enough reach for a certain task.
This is where a router collet extension becomes extremely handy. The router collet extension allows you to extend the reach of your router bit without sacrificing safety.
A few situations where extra reach can come in handy are when using templates, cutting deep mortises, or using jigs like a planing sled. The beauty of a router collet extension is that it has a collet on one end to hold a router bit securely and a 1/2" router bit shank to be chucked into the router, adding extra reach to any router bit. If it's time to add a collet extension to your shop you have a couple of choices to consider.
The first option is the Xtreme Xtension. This extension comes with everything you need to extend the reach of your router bits by 1-1/4". The Xtreme Xtension also features a quick-release collet locking mechanism that only requires a 1/4 turn of the 5/32" set screw to tighten or remove the bit from your router. This is great for above-the-table router bit changes if your router requires two wrenches or doesn't have provisions for above-the-table bit changes. The 1-1/4" reach of the Xtreme Xtension is also ideal for the router table. This means that the Xtreme Xtension can just about live in your router table full time except in rare occasions.
If you're looking for even more reach, the Router Bit Collet Extension can provide up to 2-1/4" of additional reach to your woodworking router bit. It's perfect for projects like flattening a slab or tabletop in a planing sled or using a template to make custom bowls and trays. If you followed along with our Slab Table Project this is the extension I used with the Infinity Mega Dado & Planer Router Bit to reach through the Large Router Base Plate and planing sled to smooth and flatten our red eucalyptus live edge slab.
Both of these extensions are designed to be used in a woodworking router table or with some form of router jig or extended base. It's not recommended to use these extensions in a handheld woodworking router because of the added forces applied to the bit and router itself. A little extra reach can add a lot of versatility increase the projects you can accomplish without sacrificing safety. If you don't have a router collet extension in your collection it may be the piece you're missing to bring your woodworking to the next level.