Truth 40684 white nylon multipoint lock keeper used with Maxim Interlock roller system.
3 sets of mounting holes allow for adjustment

Measurements:
Length: 1-3/4" (44.9mm) 1.767
Width: 5/8" (15.9mm) 0.626
Leg Length: 1/16" (1.5mm)
Overall Thickness: 0.278 (7.06mm)
Handed: Yes, Left & Right as Shown
Material: Nylon (plastic)
Color: White

Priced and sold each.

Markings: 40684, Part number stamped on back (underside)
The best way to figure which one you need is the number stamped on the bottom or leg length.

Related Parts:
556084 - .228 Thick, Flat Bottom RH
556085 - .228 Thick, Flat Bottom LH
556086 - .278 Thick, 1/16" Legs RH
556087 - .278 Thick, 1/16" Legs LH
556088 - .331 Thick, 1/8" Legs RH
556088 - .331 Thick, 1/8" Legs LH
556090 - .371 Thick, 5/32" Legs RH
556091 - .371 Thick, 5/32" Legs LH