THE 4 HOLE - WIDE INSIDE CORNER BRACKET IS AN EXTERNAL FASTENING METHOD THAT CREATES A 90 DEGREE CONNECTION. THERE ARE TWO ADJACENT HOLES ON EACH SIDE OF THE BRACKET. THIS FASTENER REQUIRES NO MACHINING SERVICES AND CAN PROVIDE INFINITE POSITIONING ALONG THE PROFILE T-SLOT, ALLOWING A LARGE DEGREE OF ADJUSTABILITY. THE 4 HOLE - WIDE INSIDE CORNER BRACKET ENGAGES THE 2-DEGREE DROP-LOCK FEATURE WHEN THE ASSEMBLY BOLTS ARE TIGHTENED TO THE REQUIRED TORQUE. IT IS A FASTENING METHOD THAT CAN BE REPOSITIONED AND REUSED. THE SUGGESTED MOUNTING HARDWARE CAN BE FOUND ON THE "SUGGESTED HARDWARE" TAB. ,