Kerry King of Slayer... he's an angry man, but this makes him a happy camper. This is designed to give you the 'poke' you get from turning a wah on, but without the sweeping; it's fixed. That allows you to cut through the mix for your solo, even if the mix is the rest of Slayer; i.e. very loud. 

Model: Dunlop KFKQZ1 Kerry King Limited Edition Q Zone
Made: USA, recent model
Type: fixed wah
Power: standard 9v supply or battery, draw 10mA approx
Switching: true bypass
Equivalent new street price (approx): n/a
Mods: none
Accessories: no box or manual
Condition notes: used, no major marks, very good condition