Slip chuck for dryer setups

Our dryer cups grips rods like no tomorrow. We have a flexible membrane that is user replacable. A 7mm hole with holes for a cotter pin that will never backout. Measure your motors and be sure they are compatible. Some have 8mm shafts and will require drilling. The cotter pins grt bent around the shaft making a permanent bond to your motors that will never fall off or let go on a rod. These cups have been thoroughly tested by high volume rod builders for over a year. The top complaint is that they grip too well and require turning and physical persuasion to release a rod when its done drying.