1. Product Name: Captive Panel Screws 2. Type: PFC2, PFS2 (Screw head, Spring loaded)3. Material: Stainless Steel and Steel4. Thread Size: M3, M4, M5, M6, #4-40, #6-32, #8-32, #10-32, 1/4''-205. Tool or finger operation.6. Most sizes available in three screw lengths