The disguising shoes gave poor traction; no amount of strength or speed could increase the gripping surface on the soles of his feet.
Bats also need a good gripping surface like plastic mesh.
Paul felt nothing but gratitude for Nora's spanner when it chose that moment to come free, its gripping surfaces apparently shattering in the process.
However round dogs do not provide the best gripping surface.
The shape of the gripping surface on the fingers can be chosen according to the shape of the objects that are lifted by the grippers.
Waxless cross-country skis usually have etched gripping surfaces that eliminate the need to apply grip wax.
"Further, the top surface of each pedal ideally has a gripping surface," she writes in her patent.
Hard jaws are available with either a coarse gripping surface or are ground flat and smooth to increase accuracy.
In some cases where there is too little skin to pull onto the gripping surface, pressure must be applied to the glans when applying the device.
Key turners snap onto the heads of household keys, widening your gripping surface and making keys easier to turn.