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Interdictors use a special module - Interdiction Sphere Launcher, which by the use of Warp Disrupt Probes creates a spherical field around the ship with a 20 km diameter, which prevents warping (i.e. escape from the battlefield) of all ships, that get into this field. The field, also called "Bubble", exists for two minutes, then disappears and the dictor creates a new bubble. Bubbles can be used only in null-sec and wormholes.
Besides this function, an interdictor can shoot enemy tacklers in combat.

Heavy tacklers
keep at an average distance from the enemy. They intercept the target initially held by light  tacklers and catch their own targets. If possible, heavy tacklers also perform supporting roles, for example, add a bit of damage to the general fleet damage, shoot down enemy interceptors and support ships. But their main task is to catch and keep the goal before the DPS ships arrive or until the rest of the gang switch focus (that is, until the common damage is applied on the intercepted target).
Heavy tacklers flying some recons ships are a link that connects the combat fleet and the scouts, since such a tackler can use a special stealth device - Covert Ops Cloaking Device II, that does not diminish the fighting qualities of the ship, unlike other Cloaking Devices.
In addition, heavy tacklers play an important role in roaming.
Heavy tackling is an excellent choice for those who equally like interception, combat and scouting.

Heavy-dictors (T2 type cruisers) are well protected for their type and are a serious threat to the enemy. Unlike light interdictors, heavy interdictors do not use Warp Disrupt Probes, but constantly generate an anti-warp field with the help of the Warp Disruption Field Generator. This field is stronger than that of the Warp Disrupt Probes, it disables the MicroWarpDrive of the ships caught in it, but it is also smaller in diameter - 16 km.
Heavy-dictors can be used not only in null-sec, but also in low-sec. There is a special script for that which converts the field into a directional beam. The Beam has almost the same effect as the field (sphere), but not for several ships, but only for one which the heavy-dictors "holds" with a directed beam.
Heavy interditors can hold any ships, including capital ships and the Titans.

The ships for interception: inteceptors, interdictors, heavy interdictors, recons.