Knipex 85 51 250 a spring hose clamp pliers and grip inserts knipex 85 51 250 a these 250mm l spring hose clamp pliers from knipex have been designed to be used with clamps and spring band clamps of different sizes up to 70mm versatile and adaptable to all positions thanks to rotatable grip inserts while the rotatable universal grip inserts are great for reliably gripping the clamps in all positions manufactured to a high standard with chrome vanadium electric steel forged oil hardene