Here is a Facom 286A 1/2” drive stud remover with a capacity of 5-20mm. This is new old stock and I have had to open the packet to photo. Please study the pictures. Thanks. Facom 286A 1/2″ Drive Knurl-Type Stud Extractor 5-20mm Capacity Facom 286A 1/2″ Drive Knurl-Type Stud Extractor 5-20mm Capacity Heavy Duty Roller Type Stud Remover. Covers sizes from 5 – 20mm diameter. 1/2″ Square Drive Can be used to both tighten or untighten