Features 1、100% brand new and high quality. 2、Made of zinc plated carbon steel, these thumb screws are sturdy and durable. 3、Thumb screws with flat knurled head can provide extra grip for manual tightening. 4、Thumb screws are designed to be tightened and loosened by hand,easier to drive manually. 5、Widely used for electric appliance, tools, cars where screws need to be tighten and loosen frequently. Specification Features: 100% brand new and high quality. Made of zinc plated carbon steel, these thumb screws are sturdy and durable. Thumb screws with flat knurled head can provide extra grip for manual tightening. Thumb screws are designed to be tightened and loosened by hand,easier to drive manually. Widely used for electric appliance, tools, cars where screws need to be tighten and loosen frequently. Specification: Material: Zinc plated carbon steel M3*5 D=3mm L=5mm M3*6 D=3mm L=6mm M3*8 D=3mm L=8mm M3*10 D=3mm L=10mm M3*12 D=3mm L=12mm M3*14 D=3mm L=14mm M3*16 D=3mm L=16mm M3*18 D=3mm L=18mm M3*20 D=3mm L=20mm M3*25 D=3mm L=25mm M3*30 D=3mm L=30mm Quantity: 5pcs Weight: 16g~22g / 0.6oz~0.8oz (approx.) Package list: 5 * Screws Package List