This is a Old Type Twist Catch Hatch Loft Ladder, with a small D shaped eyelet, approx 8mm in diameter. Supplied with some discontinued models (pole not included).
If in doubt about the Catch Twist spares, please call 01271 858698 for Ladders clarification and advice from out Loft Ladders team of experts.
This Twist Catch Hatch Loft Ladder information as at 23/11/17