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WARNING: Laser radiation - avoid direct eye exposure!  This item is not for 

children under 14. Misuse of the device can result in permanent eye damage.

Note: Class IIIA laser product, less than 3.5mW power output and accuracy to 

+/-2 mm at 10 m and 25 m. Not suitable for outdoor use and laser may need a 

simple adjustment to plumb level before first use. Handle with care and don't drop 

from heights to avoid damaging the glass indicators.

1.  Locate the battery compartment (3) near the power switch (2).

2.  Remove securing screw with a PH0 Phillips head screw driver.

3.  Open compartment and insert 3 new LR44 / AG13 button cell batteries paying 

  attention to polarity. 

Note: Negative contact is indicated inside compartment and positive side of battery 

goes towards spring.

4.  Replace battery cover and turn screw until snug. Overtightening may cause 

  damage to door or strip screw.

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TOOL FEATURES

Weight ............................................................................................... 8 oz.

Dimensions ................................................................... 7.3 X 1.1 X 2.5 in.

Batteries ..............................................3 LR44 Alkaline batteries included

Laser.....................................................Class IIIA, >3.5mW Power output

Accuracy ..........................................................+/-2 mm at 10 m and 25 m

TECHNICAL SPECIFICATIONS:

1.  Laser Head

2.  Laser Power Switch

3.  Battery Compartment

4.  SAE Ruled Straight Edge

5.  8 ft. (2.5 m) Tape Measure

6.  Tape Measure Lock Release

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7.  Vertical Bubble Level

8.  Horizontal Bubble Level

9.  45° Bubble Level

10.  Metric Ruled Straight Edge

Technical specifications are subject to change without notice.

WARNING: Read and understand this entire instruction manual before attempting to assemble, install, operate or maintain 

this product. Failure to comply with the instructions may result in serious personal injury and/or property damage!

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Measures, levels and projects a laser line with 3 different patterns and is ideal 

where a straight line or accurate measurement is needed.

Note: Class IIIA laser product, less than 3.5mW power output and accuracy to 

+/-2 mm at 10 m and 25 m.  Not suitable for outdoor use and laser may need a 

simple adjustment to plumb level before first use.

SAFETY PRECAUTIONS

BATTERY INSTALLATION

Move laser head to the top position 

to project a horizontal line.

Move laser head to the middle 

position to project a cross beam.

Move laser head to the bottom 

position to project a vertical line.

OPERATION INSTRUCTIONS

LASER CALIBRATION:

1.  Before putting into use verify the true accuracy of the horizontal laser line.

2.  Place the 4-in-1 Laser Pro onto a level surface. 

3.  Adjust the laser head (1) to the cross setting (Fig. 1) 

  and project laser onto a wall approx. 5 - 10 ft. away. 

4.  Use a ruler to verify the left and right sides of the laser line 

  are equal distances from the floor. This step verifies 

  accuracy of the horizontal line.

5.  If needed the angle of the projected laser line can be 

  adjusted by turning the head of the laser (1) using 

  a straight edge or large screwdriver (Fig 2).

Note: Be careful not to scratch or damage the laser lens 

during the laser adjustment process.

LASER OPERATION:

1.  Point laser towards the intended surface and away from 

  your or other’s eyes.

2.  Turn laser power switch (2) from O to I to power “ON”.

3.  Adjust Laser Head (1) to the preferred pattern by moving 

  the head to the top, middle or bottom position as shown below.

Note: The laser will stay on until you turn power switch (2) to 

the off position. 

Move the laser head to 

the middle position to 

project a cross beam.

Fig. 1

Fig. 2

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