Check the listing for details. Pneumatic Derusting Machine Air Rust Remover Derusting Descaling Polisher 6-7mm. Condition: New. Listed at 66.88 USD. Product Description Application: Apply to go paint, to rust, to welding burrs, surface treatment work, wheel hub, leakproof, repair, cleaning products, foundry industry, play sand, remove burrs,water and electricity, make hole,shovel,car maintenance factory,Rust removal,Engraving stone. Feature: 1.High efficiency needle beam-type descaling device. 2.It is efficient to remove the uneven rusting surface. 3.It is efficient to remove welding slag after welding. 4.Good wear - resistant 3mm/12pc steel needle. 5.The switch band insurance function. Specification: Work stroke: 6-7mm No-load speed: 4000RPM Diameter of steel needle: 3mm Number of steel needles: 12 Gas consumption: 4.0 CFM Inlet joint: 1/4" Length: 320mm Weight: 1.2 Kg Package： 1*Derusting tool