The blade is made of alloy steel forging,the overall heat treatment,high hardness,strong cutting ability .Blade surface black,not easy to rust .perfect for copper or thin wall stainless steel pipes .Application:ShearingCommon Type:Multi-purpose Scissorsis customized:YesShape:StandardModel Number:CT-101DIY Supplies:MetalworkingFoldable:NoType:Alloy steel bladeSize:18*3mmThickness:3mmInner hole diameter:5mmHardness:HRC65Quantity:510pcsCondition:Brand newColour:Black Material:steelPackage Contents:10* Tube Cutter PipeOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.