Designed at the Duncan Custom Shop to recreate the tone and feel of the pickups in Dave's Jackson King-V used to record the 1990 Megadeth album “Rust In Peace”. This was accomplished by altering the windings of the standard JB model to achieve the exact "Megadeth" tone Dave was looking for. Compared to the standard JB model, the Thrash Factor’s low end is tighter, the mids are slightly scooped, and the highs are more aggressive. The set includes Dave’s preferred neck pickup, the SH-1n 59 model, in matching matte finish. Hand built in Santa Barbara, California.