Suspension hooks are used when cables are mounted inside the silo and require access to the silo roof from inside the silo for installation. These heavy duty suspension hooks are designed for simple installation and long-lasting durability. Self-locking bolts secure the hook to the sensor to ensure that the bolts never loosen and the cable stays put. The hook can be mounted through an existing opening in the rafter. Several silo manufacturers provide a standard fitting for cable sensor mounting. Alternatively, a hole can be drilled through the rafter, if required.