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1.  Unfasten leg strap. (Figure 2)

2.  Unlock 2 leg safety clamps. (Figure 3)

3.  Lift legs and put horizontal leg tube into the safety 

clamp nest. (Figure 4)  Note that the height is adjustable 
depending on nest chosen. Feet should easily touch the 
ground and thighs at 90º or sloping slightly downward. 
Choose the middle height for the average. (Figure 5)

4.  Securely lock both safety clamps making sure lock is fully 

seated. (Figure 6)  CAUTION: Leg safety clamps must 
always be locked when in use.

5.  Turn chair over and stand it on the floor. (Figure 7)

6.  Raise backrest into position and adjust backrest height 

using knob on the rear of the backrest. Note: there is a 
handle for moving the chair around the room. (Figure 8)

7.  The optional pad can be installed on the rear of the backrest 

by placing the pad pocket over the backrest. (Figure 9)

1.  Remove the optional pad from the box (if ordered). 

2.  Remove the carry strap from the box.

3.  Remove the chair from the box & place it on a protected 

floor or table with the legs up. (Figure 1)

UNPACKING

page 1

OPERATION INSTRUCTIONS

Mattes Chair 

by

 OAKWORKS

®

CAUTION

MAXIMUM WORKING LOAD RATING

300 LBS.  (136 KG)

Figure 1

CHAIR SET UP

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 9

Figure 8

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