This package includes a pair of Solena SMW-100 PA Speaker Wall Mount Brackets and (4) Narrow Light Clamps for 2" Truss Systems. The Solena Professional SMW-100 wall mount brackets are perfect for securely mounting your speakers anywhere. Great for night clubs, schools, or restaurants. The professional narrow wrap around style clamp the widely used. The narrow clamp is designed for mounting your lighting fixtures and effects weighing up to 350 lbs. from truss or pipe 1.5 " to 2 " in diameter. This is a clamp used specifically in a professional envioronment. Ideal for mobile DJ's, light riggers and theater stage hands.PSSL