The M8M is an 8 string solid body electric guitar introduced by Ibanez in 2012. It's the initial signature model of Swedish guitarists Fredrik Thordendal and Mårten Hagström, known for their work with the progressive metal/ djent band Meshuggah. The M8M is built in Japan by Sugi and is based on the RG Series 
 
Neck type M8M 5pc Maple/JatobaNeck-through
Top/back/body Alder wing body
Rosewood fretboard
24 Frets Jumbo frets Prestige fret edge treatment
Bridge FX Edge III-8 bridge
String space 10.8mm
Bridge pickup Lundgren Model M8 (H) bridge pickupPassive/Ceramic
Factory tuning 1D#,2A#,3F#,4C#,5G#,6D#,7A#,8F
String gauge .009/.011/.016/.026/.036/.046/.052/.070
Hardware color Black