Patent ID: 7841355

Claim:
A modular system comprising a plurality of shaft segments, wherein the shaft segments have lengths which are multiples of a predetermined length, wherein each shaft segment has an inserting end and a receiving end, wherein one of a group of the inserting end and the receiving end has a protrusion which connects with a corresponding partially enclosed channel in the other one of said group, wherein the inserting end of any of the shaft segments is removeably connected to the receiving end of any other of the shaft segments, wherein said partially enclosed channel has a neck which locks said protrusion in said channel, wherein the inserting end is inserted into the receiving end and said protrusion is passed past said neck to lock the attachment, wherein the inserting end further comprises an indicator that is visible when the inserting end is fully inserted into the receiving end so that the position of the protrusion in relation to the channel is assessed, whereby the shafts segments are removably configurable to form one or more segmented shafts.