Air Needle Scaler, 4800 BPM, 1-1/8" Stroke. Great for surface preparation work involving the cleaning and removal of paint, rust, dirt or weld slag, the 125 Series Needle Scalers are a durable, dependable and economic option. This series comes with 19 needles, each with a diameter of 1/8“.Durability: Re-engineered needle spring delivers more than twice the life of its previous version. Versatility: Can be used with 1/8" round needles or with chisel attachments to match up with many of your surface preparation needs. Uses: Powerfully cleans surfaces by removing old paint, rust, dirt and weld slag from metal quickly without letting the grime collect in hard to reach areas like solvents do.