The best 557 burr G-557(2057) is sharper stronger. Non braking.

100 burs/ clinic pkg of brand name FG 2057 Metal cutting premium quality The shank of each bur is gold plated to protect against corrosion and to provide a firm grip in the handpiece chuck. CARBIDE BUR METAL CUTTING FRICTION GRIP G557/2057 Material Tungsten Carbide I have all other shapes for the same low price.