Getting your Trinity Audio player ready...

Drywall sanding is one of those jobs where weight, dust control, and tool balance can make a huge difference by the end of the day. Whether you are finishing walls, ceilings, remodel work, patch repairs, or full rooms, the right drywall sander can help reduce fatigue, improve consistency, and keep the jobsite cleaner.

The FLEX 120V Rotary Drywall Sander (FLEX-FC3731-Z) is built to take that workload head-on. Available as the FLEX 120V Rotary Drywall Sander (FLEX-FC3731-Z) and the FLEX 120V Rotary Drywall Sander with Light Ring (FLEX-FC3731-ZA), this sander brings together ultralightweight construction, high-efficiency dust control, improved head flexibility, and a brushless motor designed for high productivity on drywall finishing jobs.

Built Around an Industry-First Carbon Fiber Shaft

One of the biggest standout features of the FLEX 120V Rotary Drywall Sander is its industry-first carbon fiber shaft. That design helps keep the tool extremely lightweight, making it easier to sand room after room with less strain on your arms, shoulders, and back.

The FC3731-Z weighs just 6.2 lbs, making it a strong option for pros who want a lightweight drywall sander that is easier to control for long periods of time. The FC3731-ZA, which includes the detachable light ring, comes in at 7.1 lbs with the added lighting setup.

For anyone who has spent hours sanding ceilings or working overhead, that weight savings matters. A lighter sander can help reduce fatigue while giving you better control across large surfaces.

Designed for Walls and Ceilings

The FLEX 120V Rotary Drywall Sander is built with advanced ergonomics to help make sanding more comfortable throughout the day. Its flexible shaft construction and T-handle design give users more control when working across walls and ceilings, while the 56-inch tool length is ideal for standard-height rooms.

That length helps reduce the need to constantly overreach, reposition, or fight the tool angle while moving across a surface. Whether you are sanding vertical seams, ceiling joints, skim coats, or finish passes, the design is made to feel more balanced and controlled.

High-Efficiency Dust Control for Cleaner Jobsites

Drywall dust is one of the biggest challenges on any finishing job. The FLEX 120V Rotary Drywall Sander features an optimized head design that delivers high-efficiency dust control to help reduce airborne particles and keep the work area cleaner.

A vacuum hose adapter is included, making it easier to connect the sander to a vacuum system for improved dust collection. For contractors, remodelers, and finishers working in occupied spaces or tighter indoor environments, better dust control helps improve cleanup, visibility, and overall jobsite quality.

160-Degree Head Flexibility for Better Maneuverability

Another major advantage of this FLEX drywall sander is its 160-degree range of motion. That improved head flexibility helps the sander move naturally across walls and ceilings, making it easier to maintain contact with the surface while reducing awkward tool positioning.

This is especially helpful when working around transitions, corners, ceiling lines, and larger rooms where consistent movement can make the difference between a smooth finish and extra rework.

Brushless Motor Power With Better Balance

The FLEX 120V Rotary Drywall Sander uses a brushless motor that delivers high power, greater efficiency, and reduced maintenance compared to brushed motor designs. FLEX also positioned the motor in the handle instead of the sanding head, which helps improve tool balance during use.

That matters because drywall sanding is not just about power. It is about control. Better balance can help the user guide the sander more smoothly across the surface, reducing fatigue and helping maintain a more consistent finish.

The sander also includes user-friendly performance features like constant speed, soft-start, and a speed dial, giving you more control over the sanding process depending on the surface, material, and finish stage.

Light Ring Compatibility for Spotting Uneven Finishes

The FLEX FC3731-Z is compatible with the FT371 detachable ring light accessory, sold separately. The light ring helps illuminate the work surface directly at the sanding head, making it easier to spot uneven finishes, scratches, high spots, and areas that may need more attention.

For users who want the lighting included from the start, the 120V Rotary Drywall Sander with Light Ring (FLEX-FC3731-ZA) comes with the detachable light ring included. This is a great option for finishers who want better surface visibility right out of the box and want to reduce the chance of time-consuming rework.

The FLEX 120V Rotary Drywall Sander runs on 120V power with a 500W brushless motor and a no-load speed range of 1,100 to 1,650 RPM. It uses a 9-inch sanding disc, includes a 13.8-foot cord, and measures 56 inches long for comfortable wall and ceiling reach. The tool also includes constant speed, soft-start, and speed dial control for a more refined sanding experience.

The FLEX 120V Rotary Drywall Sander is a strong fit for drywall finishers, remodelers, painters, contractors, and maintenance crews who want a lighter, cleaner, and more ergonomic way to sand walls and ceilings. It is especially useful for jobs where overhead sanding, dust control, and surface visibility are major concerns.

For pros who spend long hours finishing drywall, the combination of low weight, flexible movement, strong dust control, and optional light ring visibility can help make the sanding process faster, cleaner, and easier to manage.

The FLEX 120V Rotary Drywall Sander is built to solve some of the biggest frustrations in drywall finishing: heavy tools, poor balance, airborne dust, limited visibility, and fatigue from overhead work. With its industry-first carbon fiber shaft, brushless motor, 160-degree head flexibility, high-efficiency dust control, and light ring compatibility, FLEX gives pros a drywall sander designed for productivity and comfort.

Choose the FLEX-FC3731-Z if you want the lightweight sander and plan to add the light ring separately. Choose the FLEX-FC3731-ZA if you want the sander packaged with the detachable light ring for better surface visibility right away. Don’t hesitate to reach out at cs@ohiopowertool.com or 614-481-2111 with any questions, comments, or concerns, and be sure to follow us on all your favorite social media channels to stay in the know on all the latest announcements, deals, news, and more!