Trapezoid Bi-Metal BLUE SAFETY BLADES TRAPEZOID BI-Metal BLUE SAFETY BLADES SHARPER. SAFER. BETTER. Lasts 3x longer* more cuts for your money Shatterproof for ultimate safety MULTI MATERIAL NOT POINTED Universal Use ideal for most applications Safety shaped safety points to reduce risk [5] TRAPEZOID Bi Metal BLUE SAFETY BLADES FEATURES [6] [1] + [2] 1. SHATTERPROOF the spring steel backing combined with dual hardening of the blade makes our blade more durable, and shatterproof [3]+ [4] 2.