Truth 50.61 ( Low Profile ) Encore Split Arm Dyad Operator used by Weather Shield and others.

Window Type: Wood and Vinyl Casement
Link Length: 4-7/8 inch
Link Rivet to Stud post hole: 4-7/16 inch
Link Height: 1/2 inch (11.9mm) .470
Primary Arm: Offset Down ( standard is straight)
Secondary Arm / Top Link: Offset down
Handing: Left and Right Handed as shown
Material: E-Gard or Stainless Steel
Sold: Each, Window Crank Operator only - No Handle or Cover

* Operates sash sizes up to 24" to 40" wide, and 84" high and weighing up to 108 pounds
* Encore Dual Arm provides over 7" of washability with the standard Maxim® 13" hinge and is compatible with Truth’s standard 10" hinge, with reduced washability.
* Truth Encore used the Tango Cover and folding handle