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The RA1100 adapter is available separately.For reference, the following adapter sizes are included in this Bosch kit:RA1100:threaded template guide adapterRA1103:5/16" OD, 17/64" ID, 9/64" depthRA1105: 7/16" OD, 3/8" ID, 9/64" depthRA1109: 1/2" OD, 13/32" ID, 7/16" depthRA1113: 5/8" OD, 17/32" ID, 1/2" depthRA1115: 3/4" OD, 21/32" ID, 3/16" depthRA1121: 1-3/8" OD, 1-19/64" ID, 7/16" depth You can pick up PC threaded template guides just about anywhere. This set seems okay, but it utilizes 2-piece construction, so the guide can loosen or eventually separate from the base. I think the most useful part of the kit is the RA1100 adapter, which can be used to install Porter-Cable (PC) style threaded template guides on the Bosch router sub-base.
Disappointed I am. They are made of two pieces and become loose after only a couple uses. Nice idea to have the quick change guides. They don't hold up to actual use.
Also these guides maybe a little short depending on the type of template that you are using and the distance that your base is away if you have added flat surfaces above the template. This is a great set of various sized template guides. With the Bosch quick spring action holder it's a snap to change guides but be warned that you must check the centering each time with the centering cone.
The guides are a little long for use with dovetail jigs, but work as described.
The set allows you to accomodate various bit sizes. The template guides make it easier to make accurate cuts when used in conjunction with jigs.
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