The Truth Hardware (AmesburyTruth) 15 Series Ellipse 7-1/2" Single Arm White Left-Hand Casement Window Operator (15.56.32.261) is specifically designed for use in casement windows, pairing perfectly with AmesburyTruth 14 Series Casement Window Hinges. Often referred to as a window crank or window opener, this left-handed operator is engineered to support window sashes up to 42 lbs (19 kg), with widths ranging from 16" to 22" (406 mm - 559 mm) and heights up to 63" (1600 mm).

This operator is commonly identified with the stamp "30049" on the arm.