RYOBI 40V Expand-It Adjustable 13-15in String Trimmer Attachment, Tool-Only Black, Telescoping Shaft

The RYOBI 40-Volt Expand-It adjustable 13–15" string trimmer (RY40ST01B) is a cordless, tool-only attachment that converts compatible RYOBI Expand-It powerheads into a versatile trimmer for edging, mowing close to obstacles, and routine yard maintenance.

This accessory is part of RYOBI's Expand-It system and is engineered to fit 40V Expand-It powerheads, offering a telescoping shaft that adjusts between 13 and 15 inches for working reach and maneuverability. Sold as the tool-only attachment, it does not include battery or charger, letting experienced users add it to their existing 40V ecosystem. Lightweight and designed for easy swapping, it gives homeowners a portable trimming option without committing to a whole new cordless tool platform.

How does the adjustable 13–15" shaft improve daily trimming?

The telescoping shaft lets you change cutting clearance and balance for different tasks—shorten for tighter control near garden beds and lengthen for taller grass or awkward angles. Quick adjustments help reduce fatigue and let one person handle both precision edging and general trimming.

• Telescoping shaft ranges from 13" to 15" for tailored reach
• Improves user comfort and balance during extended jobs
• Better control near plants, fences, and landscape features

What compatibility and installation steps should I expect?

This attachment is designed to clip into RYOBI Expand-It 40V powerheads—confirm your powerhead is a compatible 40V Expand-It model before purchase. Installation is tool-free and usually requires aligning the attachment collar and locking it into the powerhead's quick-connect interface.

• Works with RYOBI 40V Expand-It powerheads (battery and charger sold separately)
• Tool-free quick-connect attachment for fast swaps
• Follow powerhead manual for safe mounting and operation

What performance can I expect from the trimmer head?

The trimmer uses a durable cutting head suited for routine yard work, offering a balance of cutting power and runtime determined by the 40V battery you choose. Its spool and line system favors home landscaping tasks such as trimming lawn edges, clearing around trees, and tidying hard-to-reach spots.

• Stable cutting head designed for common grasses and edging jobs
• Line spool replacement and bump-feed or fixed-line options depending on model specifics
• Runtime and power depend on the installed 40V battery (not included)

How does owning the tool-only attachment save money and space?

Buying the trimmer as a tool-only attachment lets you expand an existing RYOBI 40V system without purchasing another battery or charger. It reduces redundancy in storage and makes it simple to keep multiple attachments on one powerhead for varied yard tasks.

• Lower upfront cost if you already own a 40V battery and powerhead
• Less garage clutter—one battery can run multiple Expand-It attachments
• Easy to swap attachments for different landscaping jobs

Who this product is for: The RYOBI 40V Expand-It adjustable 13–15" string trimmer (RY40ST01B) is aimed at homeowners and hobby landscapers who already use the RYOBI 40V Expand-It platform and want a lightweight, adjustable trimmer attachment for routine trimming and edging. Choose this tool-only option if you have compatible powerheads and batteries and want an affordable, space-saving way to add trimming capability to your yard care lineup.