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): M8*10 D=8mm L=10mm M8*12 D=8mm L=12mm M8*14 D=8mm L=14mm M8*16 D=8mm L=16mm M8*18 D=8mm L=18mm M8*20 D=8mm L=20mm M8*25 D=8mm L=25mm M8*30 D=8mm L=30mm M8*35 D=8mm L=35mm M8*40 D=8mm L=40mm M8*45 D=8mm L=45mm M8*50 D=8mm L=50mm Quantity: 10pcs Weight: 260g~394g / 9.2oz~13.9oz (approx.) Package list: 1 set * Screws1100% brand new and high quality. 2Made of zinc plated carbon steel, these thumb screws are sturdy and durable. 3Thumb screws with flat knurled head can provide extra grip for manual tightening. 4Thumb screws are designed to be tightened and loosened by hand,easier to drive manually. 5Widely used for electric appliance, tools, cars where screws need to be tighten and loosen frequently.