Lock Shop › LSDA Mortise Deadbolt Image 1 of 1 LSDA Mortise Deadbolt $95.00 For use with most commercial doors. Available in 31/32” and 1-1/8” backsets.Flip bolt: 5/8” w x 1-7/8” throw. Size: Select Size 31/32 1-1/8 Quantity: Add To Cart Added! For use with most commercial doors. Available in 31/32” and 1-1/8” backsets.Flip bolt: 5/8” w x 1-7/8” throw.