PAIR OF HEAVY DUTY METAL BRACKETS : extra strong metal brackets to support 15 inch PA speakers up to 90 Lbs. , comes pre drilled holes for 3 mounting positions to fit all sizes of speakers , can also fit 2 x 8 inch speakers on each bracket with the interchangeable metal posts EASY INSTALLATION WITH ALL MOUNTING ACCSESORIES INCLUDED : kit comes prepackaged with all mounting hardware included Lag screws , and Toggle bolts for easy installation on any kind of wall or stud with extra posts to secure 1 3/8 -1 1/2 speaker holes NEAT AND COMPACT DESIGN : Bracket can be removed from mount with one easy pull to store away when not in use Great for School Auditorium ,Class , Recording studio , Theater , Indoor and Outdoor use SLOTTED DESIGN FOR CONCEALED SPEAKER CABLE : Neat and compact design for cable management , can fit even thick XLR cable to run thru the internal of the bracket with no wire mess running down from speakers