Truth Entrygard Operator 40575 Or 40574
Common numbers found on the older version of this operator are 40575 for the right hand operator, and 40574 for the left hand operator
To determine hand of operator, if your sash lock (window lock), is on the left, you would use a left hand operator. And if your sash lock is on the right, you would order the right hand operator.
Left hand shown.