means for fastening may be projected or threaded through the channel 26 to lock the two body portions together as well as to secure the device 10 to the shaft 18 where the channel 26 is threaded a threaded fastener is used the helically threaded fastener has a threaded portion 36 a bearing surface 38 and a finger or head portion 40 the threaded portion 36 of the locking member 14 is helically threaded so as to be received by either of the helically threaded channels 26 of the two substantially identical body portions 20 20 39 additionally the bearing surface 38 of the locking member 14 is preferably made of a soft metal or plastic to prevent damage to the shaft 18 the finger or head portion 40 is designed to allow a person to easily grasp and manually turn the fastener 34 when the body portions 20 20 39 are interdigitated and the helically threaded fastener 34 is inserted into one of the helically threaded channels 26 26 39 so that the bearing surface 38 of the helically threaded fastener 34 is just short of protruding into the first aperture 16 of the body member 12 the two portions are secured together although the shaft is not secured since the fastener has a length greater than either channel this is the semi locked configuration which allows positioning of the weight on the shaft in this configuration a small section 40 of the helically threaded portion 36 of the helically threaded fastener 34 engages the semi circular notch 33 33 39 of the flange 32 32 39 on the first interdigitating member 28 or 28 39 of the opposedly arranged body portion 20 20 39 when the.