opening in the distal end of the handle such that a passageway is formed through the entire handle 210 for receipt of the plunger 215 therethrough the seat 310 has internal walls with threads 320 the threads 320 are configured to mate with corresponding external threads on the plunger 215 as described below the threads 320 can be configured to be tightened in response to counter clockwise rotation of a complimentary threaded instrument such as the plunger 215 thus when the plunger 215 is inserted into the handle 210 the plunger 215 is tightened into the handle 210 by rotating the plunger 215 in a counter clockwise direction as opposed to rotating in a clockwise direction fig4 a shows a perspective view of the plunger 215 which includes an elongate rod 405 having a handle 410 at a distal end fig4 b shows a side view of the plunger fig4 c shows an enlarged view of a tapered end of the plunger contained within circle 4 c of fig4 b the handle 415 includes external threads 415 that are configured to mate with the internal threads 320 fig3 b 3c of the handle 210 of the tube 205 the elongate rod 405 can be manufactured of various materials including for.