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 WARNING:

To reduce the risk of injury, user must read and understand the operator’s manual for 

their string trimmer and this instruction sheet. Always wear eye protection with side 

shields marked to comply with ANSI Z87.1 Ensure compatibility and fit before using this 

accessory. Do not use this accessory if a part is damaged or missing.

 WARNING:

This trimmer head accessory has been designed and tested for use with most RYOBI 

brand 18V battery-powered string trimmers. Use of this accessory on any other string 

trimmer or device could result in serious personal injury.

The 2-in-1 trimmer head accessory is designed to be dual purpose. Use with line to cut 

grasses and lighter vegetation. Use with blades to cut thicker weeds or pulpy stalks only. 

Do not use for any other purpose. Never use this accessory to cut woody brush.
Do not attempt to use the 2-in-1 trimmer head accessory for edging. This will cause pre-

mature wear on the blades.

SPECIFIC SAFETY RULES

 

Keep all bystanders, children, and pets at least 50 feet away.

 

Do not operate the trimmer with this trimmer head accessory unless the guard is firmly 

secured in place and in good condition.

 

Wear heavy, long pants, long sleeves, boots, and gloves. Do not wear loose fitting 

clothing, short pants, sandals, or go barefoot. Do not wear jewelry of any kind.

 

Save these instructions. Refer to them frequently and use them to instruct others who 

may use this product. If you loan someone this product, loan them these instructions 

also to prevent misuse of the product and possible injury.

INSTALLING THE ACCESSORY

See Figure 1.

 

Remove the battery pack if installed.

 

Following the instructions in the operator’s manual for your string trimmer, remove the 

spool retainer and spool.

 

Install the accessory so the latches on the accessory align with the slots on the string 

head. Make sure the latches click into place and accessory is secured to the string 

head. When installed correctly, the trimmer head will be up against the string head with 

no gaps.

 WARNING:

Make sure the accessory is installed as described in these instructions and that the 

latches are completely seated inside the slots on the string head. An accessory that is 

not properly attached to the string head could detach and cause serious personal injury.

USING THE ACCESSORY

See Figure 2.

 WARNING:

Always hold the string trimmer away from the body keeping at least two feet of clearance 

between any body part and the accessory head. Any contact with the accessory head 

while operating the trimmer can result in serious personal injury.

 WARNING:

To avoid damaging blades or accessory head, allow at least 1 foot of clearance between 

the blades and any nearby objects. Never use blades near sidewalks, fencing, posts, 

siding, buildings, or other immovable objects. Damaged blades or accessories can 

cause serious personal injury.

 

Inspect accessory before each use and periodically during long periods of use. If either 

blade is bent, warped, cracked, chipped, or damaged, discontinue use immediately 

and replace the blades.

 

Inspect and clear the area of any hidden objects such as glass, rocks, concrete, fencing, 

wire, wood, metal, etc., which can be thrown or entangled in the accessory.

 

Maintain a firm grip on trimmer handles while cutting with accessory head. Keep the 

accessory away from body and below waist level. Never use the accessory with the 

blades located 30 in. or more above the ground level.

 

Never cut any material over 1/4 in. diameter.

 

After releasing the switch trigger, keep rotating accessory in thicker weeds or pulpy 

stalks until they stop. Maintain proper control until the accessory has completely stopped 

rotating.

 

Do not attempt to touch or stop moving accessory. Coasting blades or line can cause 

injury.

NOTICE:

Never use trimmer accessory to cut against fences, siding, houses, buildings, or similar 

surfaces. Keep the blades at least 1 foot away. The blades may damage these surfaces.

REPLACING THE BLADES

See Figure 3.

NOTE:

 Never install blades without completely removing all line from the accessory.

 

Remove the battery pack if installed.

 

Press the two latches to release the accessory and pull it straight up from the string 

trimmer to remove.

 

With the accessory head face down in your hand, grasp the finger tabs and rotate 

counterclockwise to unlock.

 

Remove the used blades and discard.

AC052N1
2-IN-1 TRIMMER HEAD ACCESSORY

 

Install the new blades, making sure they are fully seated and the blades completely 

cover the posts.

 

Grasp the finger tabs and rotate clockwise until the hooks click back into the locked 

position.

 

Reinstall the accessory as described in 

Installing the Accessory

.

INSTALLING LINE IN THE ACCESSORY

See Figure 4.

The trimmer head comes with 4 pieces of pre-cut of .065 in. trimmer line. Look for re-

placement line where you purchased this product. Use original manufacturer’s .065 in. 

replacement line for best performance.

NOTE:

 Never install line without removing the blades from the accessory.

 

Remove the battery pack if installed.

 

Remove and unlock the accessory as described in 

Replacing the Blades

.

 

Remove the blades and store securely for future use.

 

Fold a piece of pre-cut line in half so each half is equal in length.

 

Insert the ends of the line through the eyelets in the post and pull tight.

 

Repeat with remaining post.

 

Reinstall the accessory as described in 

Installing the Accessory

.

NOTE:

 After extended periods of heavy use, a tool for gripping or prying may be needed 

to remove the used line from the post.

GENERAL MAINTENANCE

Avoid using solvents when cleaning plastic parts. Most plastics are susceptible to damage 

from various types of commercial solvents and may be damaged by their use. Remove bat-

tery pack and use clean cloths and warm, soapy water, to remove dirt, dust, oil, grease, etc.

 WARNING:

Do not at any time let brake fluids, gasoline, petroleum-based products, penetrating oils, 

etc., come in contact with plastic parts. Chemicals can damage, weaken, or destroy 

plastic, which may result in serious personal injury.

The 2-in-1 trimmer head accessory has no user serviceable parts. Do not attempt to sharpen 

or repair blades. If either blade has become bent, warped, cracked, chipped, damaged, 

or has become separated from the housing, or if you notice any abnormal vibration of the 

trimmer during use of the accessory head, discontinue use immediately and replace the 

blades.

Fig. 1

A - Bladed trimmer head accessory (accessoire 

à lames pour taille-bordures, accesorio para 

cabezal de recortadora con hojas)

B - Slot (fente, ranura)

C - Latch (loquet, pestillo)

D - String head (tête de coupe, cabezal del hilo)

A

B

Fig. 3

TECHTRONIC INDUSTRIES POWER EQUIPMENT

P.O. Box 1288, Anderson, SC 29622, USA

Phone 1-800-860-4050  

  www.ryobitools.com

995000807

9-4-19 (REV:03)

PROPER  

OPERATING POSITION

POSITION 

D’UTILISATION 

CORRECTE

POSICIÓN DE 

FUNCIONAMIENTO 

CORRECTA

C

D

A

C

B

B

Fig. 2

Fig. 4

A - Post (montant, poste)

B - Eyelet (œillet, ojillos)

C - Line (ligne, línea)

B

A

C

A - Blade (lame, hoja)

B - Unlock (déverrouillage, desbloquear)

C - Lock (verrouiller, bloquear)

D - Post (poteau, poste)

E - Finger tabs (languette digitales, lengüeta del 

dedo)

D

E

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