Well I remember some mates having them - very nice - having not taken much note of what Time did since - they don't use that system......hmmmm Look fella here......
What they were good for was kicking big dents in cars..apparently - we were riding with a 'Milk Race' winner - his name escapes me at the moment....and the driver of a car tried to run him off the road, so a couple of rather large dents were delivered to the car with the metal cleats. Argument started, but one of the following cyclists (my mate) was a copper and saw the lot - driver buggered off.