... steel locking hand retractable plunger 2.Material: SS, carbon steel, 3,High quality,cheap price 1. Type: Delrin knob stainless steel locking hand ... retractable plunger2. Material: Stainless steel, carbon steel,aluminum3 Finish: Zinc plated, passivated, ... and non-standard available Delrin knob stainless steel locking hand retractable plunger