Ferrule

The metal cylinder that surrounds and encloses the hairs on a brush. Customarily made of nickel or nickel-plated base metal.<br><br>The metal or plastic device that that aligns and anchors paintbrush bristles or hairs in an adhesive. The ferrule is attached to the handle by crimping or by binding wires. The ferrule pictured here has a brassy color.(pr. FEH-rool)