Model#: RKWNRK5121K

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Rockwell RK5121K 3 Amp Sonicrafter 31-Piece Kit

  • Rockwell RK5121K 3 Amp Sonicrafter 31-Piece Kit
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Push harder. Cut faster.
Part of Rockwell's next generation of oscillating multi-tools, the RK5121K Sonicrafter delivers the ultimate level of versatility and performance. With the unique Universal Fit System and Hyperlock tool-free blade changing system, the RK5121K allows users to safely and securely use almost any multi-tool accessory, Rockwell branded or other. The addition of Rockwell's patented Vibrafree counterweight technology ensures that not only is each cut with the Sonicrafter quick, each cut is smooth, precise and accurate with minimal vibration.
  • Universal Fit System ensures seamless accessory changes between Rockwell and other branded accessories
  • Hyperlock tool-free blade changing system provides superior clamping force to prevent blade slippage
  • Astounding 21 lbs. of force behind each cut for efficient stock removal and cutting
  • Variable-speed dial allows precise speed control for the task at hand
  • Ergonomic barrel grip design ensures a secure grip for accurate use in cutting and other applications
  • Vibration cancelling Vibrafree technology reduces tool vibration up to 50%
  • 3 Amp Sonicrafter Oscillating Tool - RK5121K
  • (26) Assorted Sanding Sheets
  • Sanding Pad - RW8938
  • (2) 1-1/8 in. Standard Wood End Cut Blades - RW8933
  • Rigid Scraper Blade - RW8921
  • Carrying Bag


Weight: 2.9 lbs.
Accessories Included: 30
Accessory Change: Universal Fit
Adapter Type: Hyperlock
Amperage: 3A
Cord Length: 10 ft.
Hertz: 60 Hz
OPM: 11,000 - 20,000
Oscillating Angle: 3.2 Degrees
Power Type: Electric
Speed Settings: Variable Speed
Voltage: 120V



4.7 / 5.0
23 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Yes, I would recommend this to a friend (1)
No, I would not recommend this to a friend (1)
Powerful (1)
Best Uses
Frequent Use (1)
fast cuts
Got this a couple weeks ago. Like the easy blade changes and it cuts pretty fast, lot better than another brand I used to have. Feels sturdy & well made. Very satisfied.
November 5, 2014
Originally posted at
Ready to expand it's accesories!!!
I bought this tool to cut an Avonite countertop as there was some close work at the back of the counter, the Sonicrafter handled the job with NO PROBLEMS, while my cut wasn't perfect, a few twists and a quick change to a sanding head and it's smooth as silk now. This tool will come in handy for MANY JOBS around your house or jobsite. I LOVE MINE!!!
July 23, 2015
Originally posted at
Get it
Doing a large remodeling job on my house. You just won't know how handy this tool will be to have till you have one.
April 22, 2015
Originally posted at
Yes, I would recommend this to a friend
Best Uses
Frequent Use
This little tool can fit into all sorts of nooks and crannies and its powerful enough to get the job done - whatever that job may be: cutting off a nail in a tight area, sanding corners, cutting the baseboard for floor installation. I am looking for reasons to use it!! No key is needed to change tools because of the self-locking mechanism on the top. And I love that it can use other brand blades/saws. I took my time and shopped around and found that Tyler Tool offered this at the absolute lowest price, as well, and, that included free shipping! You cannot go wrong with this purchase!
September 24, 2015
Great tool!
Great oscillating tool very dependable and seems to be tough and sturdy better than the last brand I had! Cuts through like butter makes things much easier!
July 22, 2015
Originally posted at
The tool is very fast and it provided a smooth and precise cut the hard you go into the material the faster it goes and it does a really good job. The tool is light weight and very handy I love it.
March 4, 2016
Originally posted at
Must have
Must have

I love how handy this tool is and light weight! How easy it is to cut through nails. It's a must have!
March 7, 2016
Originally posted at
Great tool !
Very happy with this tool. Cuts well in tight places. more powerful than I expected.
March 27, 2016
Originally posted at
Everything it said it was.
I ordered online. Its a very handy tool to have. I am very pleased with this tool. I would order Rockwell again.
April 14, 2017
Originally posted at
super solid , easy blade chanes
My oscillating tool from Harbor Freight died ,Thought I would give Rockwell a !!! No more harbor freight for this guy !Super quality, low vibration , low noise , its a brute !!!
April 22, 2017
Originally posted at

Questions & Answers

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Browse 4 questions Browse 4 questions and 4 answers
What is the warranty?
A shopper on Dec 7, 2016
BEST ANSWER: Rockwell products are backed by a industry-leading 3-Year Limited Warranty & great customer support.
Can cut metal?
A shopper on Oct 3, 2016
Can this be used to cut hard metal 1/8 thick.
TIMOTHY on Dec 4, 2014
BEST ANSWER: I would not recommend that unit to cut metal.
Bob on Oct 3, 2014
BEST ANSWER: We would certainly recommend using Rockwell accessories however mix and matching non-OEM blades is acceptable.