Cazares' main guitars in Fear Factory were previously custom-made 7-string Ibanez models with Seymour Duncan Blackouts pickups installed, usually detuned a whole step (A,D,G,C,F,A,D; from Obsolete on) to allow for even lower registers. His main guitar in Asesino is an Ibanez prototype 8-string guitar (standard tuning with two extra basses: (F#,B,E,A,D,G,B, E) loaded with 2 Seymour Duncan Blackout 8 active pickups. Before using Ibanez guitars, his main instrument was a black custom shop ESP M 6-string guitar with a single EMG 81 in the bridge, detuned to B tuning. This can be seen in the video for the song "Replica". His first known Ibanez 7-string is an Ibanez Universe UV7SBK "Silver Dot", with a modified pick guard to fit a single passive pickup and a volume knob. He was also known to have an Ibanez Universe UV777BK with similar modifications, except with an EMG 7-string prototype instead of a passive pickup.