one of the locking indentations 224 b with reference now to fig1 a partial detailed perspective view of an embodiment of the upper section of a modular securing device 100 and the handle of the t handle locking key 200 with a cutaway view of the fixed holding bushing 221 is provided in the unlocked state shown the t handle 212 is in a horizontal orientation and the t handle body 210 is inside the fixed holding bushing 221 to lock the t handle 212 attached to the t handle body 210 by screw 216 is first depressed inwardly this inward depression exerts a force against the biasing force of the tension spring 230 the tension spring 230 is compressed between the inner spring plate 232 and outer spring plate 234 when the spring 230 is fully compressed and the quick alignment pin 214 extends beyond the fixed holding bushing 220 shown in fig9 the t handle 212 may be rotated into a vertical or locked position when the inward depression force on the t handle 212 is released the biasing force of the spring 230 locks the quick alignment pin 214 into place in the locking indentations 224 b with reference now to fig1 a detailed cutaway view of an embodiment of a t handle retain acme threaded shaft stud assembly 300 is provided the t handle acme threaded shaft stud assembly 300 comprises the handle assembly 301 and the stud assembly 310 the handle 304 is connected to the handle body 302 by the handle extension 306 the handle body 302 has a hollow threaded interior 308 the hollow threaded interior 308 may.