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INSTRUCTION SHEET 

80027 6" Precision Marking T-Rule with Pencil 

80028 12" Precision Marking T-Rule with Pencil 

80029 18" Precision Marking T-Rule with Pencil

This T-Rule is a precision measuring and marking instrument for use in 
many applications.

PACKAGING CONTENTS

ITEM DESCRIPTION

QTY

T-Rule

1

B

T-Bar

1

C

1/4"-20 x 1/2" hex head screws

2

1/4" plastic washers

2

E

1/4"-20 round knobs

2

F

Pentel

®*

 0.5 mm mechanical pencil

1

* Pentel

®

 is the trademark of PENTEL KABUSHIKI KAISHA.

Figure 1

A

B

E

C

D

6" T-Rule shown

F

ASSEMBLY

1.  Slide the two 1/4"-20 x 1/2" hex head screws into the slot on the T-Bar.
2.  Place the two holes in the T-Rule over the hex head screws, make sure 

the end of the T-Rule is firmly against the lip on the T-Bar.

Figure 2

T-Bar

T-Rule

1/4"-20 x 1/2"  
Hex Head Screws

T-Rule against lip

1/4"-20 x 1/2"  
Hex Head Screws

3.  Place the two plastic washers and round knobs over the hex head 

screws and tighten. 

NOTE: 

If the two screws become loose, before 

tightening make sure the end of the T-Rule is firmly against the 
alignment lip on the T-Bar.

Figure 3

1/4" Plastic Washers

1/4-20 Round Knobs

TO USE
To Make a Mark

0.5 mm Mechanical Pencil (supplied): 

Hold the pencil vertically and draw a 

short line in one of the slots or twist the pencil in a hole to mark a dot.

Wooden Pencil:

 sharpen the pencil, twist the lead once or twice in one of 

the holes for an ultra fine point ready for marking.

Metal Scribe or Center Punch:

 the scribe or center punch MUST be 

sharp enough to fit through the holes. ONLY use finger pressure to mark 
a precisely located “dimple” in soft materials such as wood, paper, plastic, 
brass or aluminum. DO NOT hammer the point into the hole this will result in 
damage to the precision rule.

Marking Relative to the End or Edge of the Workpiece

Place the T-Bar against the end or edge of the workpiece and make a mark 
in the hole or slot at the desired measurement.

Figure 4

Drawing a Line Parallel to the Edge of the Workpiece

Hold the pencil vertically in one of the holes at the desired measurement and 
draw a line by sliding the T-Bar along the edge of the workpiece.

Figure 5

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