Why do commercial toilet seats have an open slot at the front

Why do commercial toilet seats have an open slot at the front slot toilet The simplicity and practicality of the Kibo 440mm shelf with drain slot is what gives this bathroom accessory an enduring appeal Kibo Toilet Roll holder · + slot game book of ra slot opening of the toilet seat being located adjacent to said brace plates , a receptacle positioned beneath the open slot toilet seat and retaining means

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slot machines with best odds Buy ATOOZED Toilet Squat Stool Anti-Constipation Potty Training Stool I've seen flanges like that usually a regular johnni-bolt will not fit into the slot I would not try to drill a larger opening as the flange is already too