Fraser Oaks, Inc.

Phone: 775-461-3655
Email: fraseroaks.com


Click here for Fraser Oaks Distributors

The Fraser Oaks, Inc. Adjust-a-Ring™ - designed by an electrician for electricians.  The only fully functional adjustable plaster ring.



Round 3/4" to 1.5"
  • Use in prefab, commercial, residential, old work or new work.
  • Compare costs. Mud ring + extender + trip to supply house OR an Adjust-a-Ring on the shelf or in the truck.
  • The MR-21R has been tested by UL for support of 50 lb Fixture/Luminaire.
Single gang in 5/8" to 1.25" or 3/4" to 1 1/2"
  • Adjusts with 1 hand.  Does not require 2 hands to pull, push, hold and tighten only to have it out of adjustment once tightened.
  • Can be adjusted before, during or after installation. No prohibitions regarding adjustment frequency or time.
  • Never drop the retaining clip in the box.
  • Can be installed on any 4S box without regard to position of box or ring.
  • Single gang and round can be installed on any 4S shallow box.  The double gang requires a 4S deep box.   
  • No mud interference if extended prior to sheetrock installation.
Double gang 5/8 to 1 1/2

  • No mud in the adjusting screws.
  • Wide body allows for easy installation of all wiring devices and cover plates.
  • Solid mounting.  Won't dislodge or fall off the box with outside impact.
  • Easy routing for the sheetrock installation.
  • No mud under an adjusting screw overhang.
  • Use in the kitchen and bathroom and avoid tile and granite overlap.
  • No more sheetstock trimming.
Triple gang 3/4" to 1 1/2"
  • Use when mirrors are to be installed.
  • No more broken or cracked mirrors.
  • Use to avoid mud fill and remove the cleanup requirements.
  • No more lost boxes.
  • Can't be accidently adjusted by pushing after installation.
  • Donít be misled by knock-offs which have the adjusting screw outside of the plaster ring and can be covered by sheetrock, mud, tile or other sheet stock.
group photo of all Adjust-a-Ring products
  • 5 models are available.
    MR-11 -- 5/8" single gang extends to 1 1/4"
    MR-2 -- 3/4" single gang extends to 1 1/2"
    MR-12E -- 5/8" double gang extends to 1 1/2" (deep box required)
    MR-21R -- 3/4" round extends to 1 1/2"
    MR-23 -- 3/4" triple gang extends to 1 1/2"
  • Self Grounding wiring devices should not be used without a grounding pigtail.


The Adjust-a-Ring™ conforms to UL STD 514A and is certified to CAN/CSA STD C22.2 No. 18.1.
The Fraser Oaks, Inc. adjustable plaster ring cover is a listed product with Underwriters Laboratories.

Underwriters Laboratories   File # E253037
To reference the U.S. listing at UL click on Fraser Oaks United States Listing
To reference the Canadian listing at UL click on Fraser Oaks United States Listing


Distribution from Cooper B-Line

Distribution from Garvin Industries

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Distribution from Orbit Industries, Inc.

Distribution from S-P Products

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U.S. Pat: 6,820,760
U.S. Pat: 7,276,661
U.S. Pat: 7,410,072
U.S. Pat: 7,637,385
U.S. Pat: D584236
U.S. Pat: D579879
Canadian Patent: 2480655
Canadian Patent: 2591548
Canadian Patent: 2484132


©Fraser Oaks, Inc.