djc wrote:
The original description was not as clear as it could be. Having
described a single section of carpet "with one gripper rod near the
bottom of each riser and another near the back of each tread" the second
clause "with the spikes pointing towards each other" might be taken to
refer to the same pair of grippers. Not a 'pair' composed of adjacent
riser tread pairs



Exactly. If you're talking about that single piece of carpet then the
pair of grippers that hold it in place point away from each other.