Truth Rectangular spring action foot bolt pack for patio door  -  Long 25/32 inch (20mm) Bolt 

This foot bolt has four screw holes, plastic triangular base and spring action 5/16 inch diameter bolt. 
The bolt protrudes .79 inch when extended in locked position.
This pack includes an auxiliary strike plate and a foot bolt keeper.

Body Height: 1-3/4 Inch
Body Width: 3-3/16 Inch
Overall Height: 2-5/8 Inch
Bolt Diameter: 5/16 Inch
Bolt Extension: .79 Inch
Bolt Throw: 1 inch when locked
Hole Center: 1-7/8 inch (bottom holes), 2-1/8 inch (top holes)
Hole Pattern: 4 Hole

Color Options:
Beige
Canvas

Contains 1 foot bolt, 1 auxiliary strike plate, 1 foot bolt keeper, installation screws
Priced and sold as a pack.

Note: Truth foot bolts are available with standard .56 inch  and long .79 inch bolt 
15301 - Triangular Base, .56 inch bolt
15302 - Rectangular Base, .56 inch bolt
15307 - Rectangular Base, .79 inch bolt 
15303 - Strike Plate, 2 hole Flat
15304 - Strike Plate, 1 Hole Offset
15305 - Strike Plate, 2 Hole Angled