I am happy with this purchase and will definitely use this supplier for tools in the future. Four gaskets are included as shown in the picture. As you'd expect, they come in standard thicknesses of .500", .250", and .125" (x2). This mandrel should accept a wide range of side cutters, rip saws, etc. It fills the gap I've had in my tool collection for a long time and greatly expands the types of cutters I can use. IMO this is a great arbor for the price. You can pay A LOT more for a prettier but…