Model: #P531

4.6 | 157 Reviews
RYOBI™ introduces the new and improved 18V ONE+™ SPEED SAW™ Rotary Cutter, an excellent choice for a variety of cutting applications. The Rotary Cutter accepts 1/4 in. and 1/8 in. bits and features a depth setting that can be adjusted for making cuts in different types of materials. The Spindle Lock helps make one-wrench bit changes easy and the ergonomic, compact design of the tool helps the user finish their project comfortably. The 18V ONE+™ SPEED SAW™ Rotary Cutter is sold as a bare tool, allowing you to build your ONE+™ collection without spending additional money on batteries and chargers with each tool purchase.


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  • Battery: 18 Volt
  • RPM: 27,000 (No Load Speed)
  • Collet Size: 1/4 in. and 1/8 in.
  • Depth of Cut: 1 in. Depth of Cut Adjustment
  • Tool Weight: 1.6 lbs


  • P531 SPEED SAW™ Rotary Cutter
  • 1/8 in. Plywood Bit
  • 1/8 in. Drywall Bit
  • 1/4 in. Collet
  • 1/8 in. Collet Adaptor
  • Wrench
  • Operator’s Manual


18V ONE+™ SPEED SAW™ ROTARY CUTTER is rated 4.6 out of 5 by 157.
Rated 4 out of 5 by from Lightweight but poor power button placement I bought this to add to my growing Ryobi ONE+ collection of tools and to replace my corded Dremel. It works great to cut holes for pot lights and ceiling speakers but the placement of the power button is not ideal. It should be a trigger button, not at the bottom of the handle. I accidentally turned it on or off several times. Also, there is no storage for the supplied wrench to change the blade. I would've expected a clip or a slot to put it in. I ended up using a velcro strap to attach it to the handle.
Date published: 2020-05-16
Rated 5 out of 5 by from Great tool for cutting holes in drywall This is an excellent tool for quickly and easily cutting holes in drywall. Included are both a piloted as well as non-piloted bit for all your different drywall cuts. The one issue which may have just been my unit was the instructions for removing the depth adjustment ring are not terribly accurate. They state "Depress spring-loaded tab. Lift depth adjustment ring off tool.". No amount of "lifting" would get the ring off, rather a good twist after depressing the tab seemed to get it off rather easily. Other than that initial struggle, it has proven an excellent addition to the tool box.
Date published: 2020-12-10
Rated 5 out of 5 by from Portable Rotary Tool with Plenty of Power I bought this for cutting drywall around electrical boxes, but have also used it successfully for other functions. Recently used it to cut off a bolt in a tight area with a cutoff wheel. Tool has plenty of power and I like how easy it is to add/remove the collar for when I need to keep it flush to a surface. Great tool!
Date published: 2019-06-15
Rated 5 out of 5 by from A Must Have Tool For Your Ryobi Line-Up This is such a great tool, it is a must have for your Ryobi Line-Up, This tool is so great i was in need of an easier way to cut holes in drywall instead of using a Knife or Multi-Tool , which is great for squares but i needed circle cuts for my fans electrical boxes and, i came across this tool for only 39.99 and what a awesome deal. I am so glad i bought this tool. It has met my needs and i can use it now when doing other jobs for clients. I would highly recommend this tool to anyone for sure.. Thanks Ryobi for another awesome tool added to my Line-Up
Date published: 2019-08-27
Rated 5 out of 5 by from Works great I am retired and do a lot of wood working to stay busy. I bought this saw so I wouldn't need to always set up the table saw for smaller projects. It was a great choice because it is very easy to make straight cuts using the built in guide. With a 4ah battery it still seems pretty light. I was able to make all 22 cuts of 2x4 and the battery still had plenty of power left. Great buy everyone who works with wood should have one!!
Date published: 2019-04-03
Rated 5 out of 5 by from Light weight - cordless freedom! Doing a major reno with over 4000 sq ft of drywall. I use a rotary tool for the cut-outs, for light switches, lights, and outlets. My corded rotary tool finally quit on me (2nd one in as many years) and I decided to give Ryobi a try. Love the cordless option. Fits nicely in my tool pouch, which helps keep my hands free for other things. Lot's of power for cutting dry wall board. Another great tool from Ryobi!
Date published: 2019-04-11
Rated 3 out of 5 by from No part no. for replacement bits No part no. for replacement bits.I looked every where in manual and online but no where does it tell you where or what bis you need.
Date published: 2020-07-01
Rated 4 out of 5 by from Good tool I have used this cutter for drywall and some Dremel attachments. It seams to work well for all the jobs I have used it with. My only complaint is that sometimes it doesn't want to start and I have to toggle the switch a few times to get it to start. It hasn't been a big enough issue that I have contacted customer service about.
Date published: 2020-09-27
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