1.Type:Delrin knob stainless steel locking hand retractable plunger 2.Material: SS, carbon steel, ... quality,cheap price 1. Type: Delrin knob stainless steel locking hand retractable plunger2. Material: Stainless steel, carbon steel,aluminum3 Finish: Zinc plated ... according to your request.10. Standard and non-standard available Stainless steel Delrin Knurled hand retractable plunger