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 Size(D*L, diameter*length; Optional): M6*8 D=6mm L=8mm; 2pcs M6*10 D=6mm L=10mm; 2pcs M6*12 D=6mm L=12mm; 2pcs M6*14 D=6mm L=14mm; 2pcs M6*16 D=6mm L=16mm; 2pcs M6*18 D=6mm L=18mm; 2pcs M6*20 D=6mm L=20mm; 2pcs M6*25 D=6mm L=25mm; 2pcs M6*30 D=6mm L=30mm; 2pcs M6*35 D=6mm L=35mm; 2pcs M6*40 D=6mm L=40mm; 1pc M6*45 D=6mm L=45mm; 1pc M6*50 D=6mm L=50mm; 1pc Weight: 22g~40g / 0.8oz~1.4oz (approx.) Package list: 1 set * Screws 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.