safety checks are similar to the crutches
ferrules must have good grip on it and are securely on the legs
the poppers must be visible and are stable
the poppers must be at the same level on each leg
the shafts must maintain their integrity - shouldnt be any dents, as it may collapse if someone puts their weight on it
there should be a sticker saying its been confirmed for safety (same as crutches)
the handles mustnt have any cracks