One of the fittings bolted to the side of a cage to engage the rigid guides in
a shaft. Usually there are two for each guide, one at the top and one at the
bottom of the cage. The shoes are usually about 1 ft (0.3 m) long and shaped to
fit closely around about three-quarters of the guide, with sufficient clearance
for free movement but not sufficient to allow the shoe to come off the guide. Nelson
Source:
Dictionary of Mining, Mineral, and Related Terms
