Abstract: A two piece cable tie is provided having an improved locking device support. The cable tie includes a strap with a first end and a free end, a locking head having a strap accepting channel, and a metal locking device mounted within an anchoring housing region of the head to form a cantilever beam having a mounted end fixed to a support of the locking head and a free end positioned within the strap accepting channel. The strap includes a central inwardly projecting groove of a predefined width that defines a thinned portion extending along a longitudinal axis of the strap to the free end of the strap. The strap accepting channel has a channel width W1 defined between an end wall and the inner wall The strap accepting channel also includes a support guide projecting from the inner wall of the locking head into the strap accepting channel to restrict the width of the channel accepting channel to a width W2, which is less than W1.