Grade 2 Titanium Hand-piece includes quick-change screen feature, as well as glass handle for safety and hands-free use when no screen is required. The titanium hand-piece improves the performance of our units by allowing greater heat transfer. They also should never be left on the heater for greater than the duration of the pull (30seconds). The quick screen change feature helps to ensure the unit always performs at its optimal by allowing the user to easily change the screens. Please note that all Ditaniums come with 14mm titanium mouthpiece/adapter. Please see our Titanium Set- Standard if you desire the the mouthpiece as well.