They are Pentolite cylinders (a mixture of Pentrite and TNT), sensitive to the No. 8 detonator; they have high density, velocity, and detonation pressure.
Seismic Pentolite
Seismic Pentolite is a mixture of Pentrite and TNT, packaged in plastic cylinders that allow loads to be coupled together.
Conical Breakers
They are conical bodies filled with pentolite (a mixture of Pentrite and TNT), sensitive to detonator No. 8; they are of high density, speed, and pressure.