Hero Factory Weapon, Saw with Molded Flat Silver Sword Blade Pattern, LEGO® Part# 98568pb02. This piece in red appeared in set #31313 Mindstorms EV3 and set # 6227 Hero Factory Breez. This piece in black appeared in set# 4526 Batman. 

To learn more about the Hero Factory and Bionicle parts we offer call us at our store at 470-414-2208 and we'll be happy to help.