“I keep meaning to send an email and let you know that I got the prem. Indian Rosewood and was very pleased. You all at LMII have always given me great reason for trust in doing business with you. You have always treated me well and in a prompt and professional fashion. You have always helped with any problems that I might. have. Your staff is knowledgeable and professional and the materials have been great. You guys run the type of business that makes me look for things I need that I can get from you. If that doesn't work (look for things I might need in the future). Thank you for giving me a place where I can buy my materials with confidence.”

Michael M.

LMI Rotary Plunge Tool Assembly

Stock is limited. When they sell out, it will be about 2 months before more will be available.

Makes precision plunge cutting a breeze!                 MADE IN THE USA



Here’s what LarryRobinsonInlaySQUAREworld renowned 
Inlay Artist
Larry Robinson

to say about this tool:

"I've tried a lot of different bases over the 40 years I've been inlaying and none have been as satisfying to use or as comprehensive in their functions as the
LarryRobinsonQuote200one Luthier's Mercantile has designed. It's beautiful enough for techno nerds to admire and simple enough for beginners to easily utilize. It's a well thought out piece of art." 

HomepageVIDEOtipsRed75 OverviewInstructions300 RTPBBaseMountingHoles200
About the Tool 
Overview &
base pattern

The Rotary Tool Plunge Assembly comes fully assembled and pre-adjusted. Springs, adaptor (if required), standard acrylic base, and two hex wrenches included.

  • Rigid, compact, open base design allows you to clearly see your work area. The ridges machined into the base make it easy to hold and move, and the straight sides allow for the easy use of a fence. 

  • Plunge slider makes for quick, precise,
    repeatable plunge movement with no need
    for locking - just slide/plunge and cut. There is an easy access fine depth adjustment making on-the-fly depth changes a breeze. The counter-balance springs provide just the right amount of spring action to offset the tool being used (see image). 

  • Anti-vibration system assures there is no
    slop in the depth of cut adjustments. The anti-vibration adjustment prevents tool vibration from affecting the fine depth adjustment and altering the depth of cut - no locking!

  • Maintenance free graphite dry-lubricated linear bearings keep the plunge action from binding.

  • Supports 3 popular rotary tools – Dremel, Foredom #30 handpiece, and Proxxon. Because the Dremel adaptor is threaded and not the RTPB itself, the Dremel tool can be oriented so that the power switch is in a convenient position. The Proxxon adaptor is a simple sleeve and the Foredom tool needs no adaptor meaning all tool orientations can be changed easily. See base with Dremel tool.

ADDITIONAL TOOLS (available below):

  • Digital Depth Gauge (DDGmakes determining your depth of cut a simpler task (See more info).
  • 5/64" ball end hex wrench (RTPBHW) 
    This ball end hex wrench is perfect for making fine adjustments (photo).

SKU Product Name In Stock Each  
RTPBD Rotary Tool Plunge Assembly for Dremel Yes $259.75
RTPBF Rotary Tool Plunge Assembly for Foredom Yes $259.75
RTPBP Rotary Tool Plunge Assembly for Proxxon Yes $259.75
DDG LMI Digital Depth Gauge Yes $37.95
RTPBHW Optional 5/64" ball end hex wrench for fine adjustments Yes $4.75
RTPBHSPR Replacement springs for RTPB - Dremel and Proxxon Yes $10.25
RTPBLSPR Replacement springs for RTPB - Foredom #30 handpiece Yes $10.25
RTPBADAPD Replacement tool adaptor for RTPB - Dremel
Yes $17.95
RTPBADAPP Replacement tool adaptor for RTPB - Proxxon
Yes $17.95

In addition to the RTPB base itself, there are some very slick attachments available: