Know as the "Jesus Wrench" for is cross shape. A long-time standard wrench in the lighting industry for use on the standard bolts on older ERS, PAR and Fresnel fixtures. Particularly useful on the older metal diamond tilt handles on older Altman fixtures. Manufactured by Altman. More politely and properly called an http://www.controlbooth.com/forums/glossary/8992-altman-wrench.html or http://www.controlbooth.com/forums/glossary/9007-century-wrench.html.