The CMT 507.095.33 Router Collet Extension from CMT is engineered to dramatically increase the usable reach of your 3/8 in. shank router bits, giving woodworkers and cabinetmakers access to deep recesses, cavities, and blind pockets that a standard bit-and-collet setup simply cannot reach. With a total length of 13 in. and a 9.5mm bore diameter, this collet extension bridges the gap between your router collet and the bit shank, letting you push deeper into your workpiece without sacrificing control or concentricity.

Key Features

• 3/8 in. shank compatibility - mates directly with routers fitted with 3/8 in. collets, making it a plug-and-play solution for a wide range of hand router setups without any adapter hardware
• 13 in. total length - provides the extended reach needed to rout deep mortises, recessed panels, and cavities that cannot be accessed with a standard collet and bit combination
• 9.5mm (11/32 in.) bore diameter - accepts 9.52mm shank router bits securely, ensuring a firm grip that minimizes runout during demanding routing passes
• Solid steel construction - maintains concentricity throughout the full 13 in. extension length, delivering clean, accurate cuts even at depth where flex and vibration can otherwise compromise results

Why This Product

• Designed specifically for 3/8 in. collet routers, this extension eliminates the need to purchase a dedicated long-reach router bit for occasional deep-routing tasks - simply pair it with a bit you already own
• The 13 in. total length gives operators meaningful extra reach into deep workpieces, making it practical for cabinet door recesses, custom millwork, and deep-cavity routing applications that standard setups cannot address
• The 9.5mm bore holds 9.52mm shank bits concentrically, so accuracy is preserved at depth - a critical advantage when tight tolerances matter in fine woodworking and cabinetry
• CMT's solid steel build ensures the extension remains rigid under load, reducing chatter and deflection that can ruin a deep routing pass on expensive stock

Specifications

• Manufacturer Part Number: 507.095.33
• Brand: CMT Orange Tools
• Shank Diameter: 3/8 in.
• Bore Diameter: 9.5mm
• Total Length: 13 in.
• Compatible Machine: Hand Router

Frequently Asked Questions

What router collet size does this extension require?

This extension is designed for routers equipped with a 3/8 in. collet. The 3/8 in. shank slides into your existing 3/8 in. router collet just like a standard router bit shank would, so no special adapter is needed.

What size router bit shanks will this extension accept?

The CMT 507.095.33 features a 9.5mm (11/32 in.) bore, which is designed to accept router bits with a 9.52mm shank. Be sure to confirm your bit's shank diameter before use to ensure a proper, secure fit.

How much extra reach does this extension provide?

The extension has a total length of 13 in. This added length allows a standard 3/8 in. collet hand router to reach deep into cavities, recesses, and pockets that would otherwise be inaccessible with a conventional bit-and-collet setup.

Is this extension suitable for use on a hand router only, or can it be used in a router table?

Based on the product data, this extension is specified for use with a hand router equipped with a 3/8 in. collet. Always follow your router manufacturer's guidelines and confirm compatibility before mounting any accessory in a router table configuration.