Lock Shop › LSDA Mortise Hookbolt Image 1 of 1 LSDA Mortise Hookbolt $95.00 Fits in most commercial doors. Comes in 31/32” and 1-1/8” backsets.Hook Bolt: 5/8” w x 7/8” throw. Size: Select Size 31/32 1-1/8 Quantity: Add To Cart Added! Fits in most commercial doors. Comes in 31/32” and 1-1/8” backsets.Hook Bolt: 5/8” w x 7/8” throw.