Musclechuck Assembly
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Once the Musclechuck™ assembly has been installed on the router, it will enable the cutters to be exchanged with extreme ease. The Musclechuck™ assembly gives you easy access when changing cutters and eliminates the cumbersome use of wrenches. Along with it's superior grip, it also gives you some extra length when using router plates (approx. 1/2") or a router table so the full length of the cutter can be used. Consequently, because of it's extreme ease of use, no more dropped or damaged cutters or frustration will result when changing tools.

The body of the new Musclechuck™ assembly is slotted in such a way that allows the tool shank to be held circumferentially, when the cap screw is tightened.  In the past most quick change chucks relied on one or more cams to retain the tool shank. However, the Musclechuck™ assembly doesn't contain a cam and because of it's superior holding capacity, larger cutters can be held more securely without damaging the shank of the tool.
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“The Musclechuck™ assembly makes fitting and removing cutters a pleasure with all forms of routing.
You only need a batch of work involving frequent cutter changes to appreciate its benefits.” - Ron Fox in The Woodworker magazine

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