Problem of PML 1000 model Permanent Magnetic Lifter can't lift 1,035KG

We retire all permanente magnetic lifter from the order because we have problems in customers, PML 1000 model cant lift 1,035KG like video in below link.

 https://youtu.be/vAco_zib3CA

Wait your reply.

RAMHOIST: 

For small V but not big V (Difference: http://ramhoist.com/Lifting-Handling-Equipments2/2173.html)

Remark: The length of the iron plate of a single Permanent Magnetic Lifter cannot exceed 3 meters

Before using, pls check the thickness and length of the steel plate you lift, in the above chart, there is Weight corresponding to thickness