Brake Blocks (x2) Carbon fibre which we find is the best material for the job. Internal Circlip to keep the Spool Bearing in exactly the right place. Tournament Circlips Super strong Tournament Circlips to keep the Drive Plate/Brake Block Holder firmly in place on the Spool. Drive Shaft Assembly Our latest design featuring a built-in ball bearing inserted into the base of the drive shaft with a raised shim specially designed so that the drive shaft rotates on the inner race of the bearing.