The Kwikset 83521-00 adjustable radius corner spring latch is a replacement spring door latch for door-edge preparation for compatible kwikset passage or privacy knob and lever hardware.Retracts with the knob or lever and springs outward to hold the door closed. This is a model-specific service component, so the dimensions, corner profile, installation style and compatible lock family must match the existing door preparation.Product Details Manufacturer part number: 83521-00 Product type: Replacement Spring Door Latch Application: Door-edge preparation for compatible Kwikset passage or privacy knob and lever hardware Operation: Retracts with the knob or lever and springs outward to hold the door closed Package scope: Replacement latch component only; knob or lever trim, strike and mounting hardware are separate unless stated otherwise Profile: Radius Corner Backset: Adjustable 2-3/8″ to 2-3/4″ Configuration: Adjustable configuration; Radius Corner profile; Backset: Adjustable 2-3/8″ to 2-3/4″ Compatibility: Compatible Kwikset hardware with matching dimensions and preparation. Compare the existing component, manufacturer part number and door preparation before ordering.Additional Kwikset InformationView Kwikset Manufacturer WarrantyShop All Kwikset ProductsDo not use prints made from this website to mark distances.Due to individual printers, dimensions on installation instructions may not print at an accurate scale.