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 M8*16 D=8 L=16 M8*18 D=8 L=18 M8*20 D=8 L=20 Quantity: 10pcs Weight: 393g~450g / 13.9oz~15.9oz (approx.) Package list: 10 * Screws Package List