The 3M Roto Peen Flap Assembly effectively peens a variety of metals.

• Imparts a compressive residual stress that benefits the material by strengthening its durability
• Flap/mandrel assembly is portable for added convenience
• Tungsten carbide shot is bonded to the flaps, providing a cleaner peening method than loose shot blasting
• Available in three flap sizes for both small and large surface areas