Safety Clamp Type T Safety Clamps Type T are tools for handling flush joint pipes and drill collars. They can accommodate pipes from 1.1/8 to 4.1/2inch. They are designed and manufactured according to API Spec 7K. Model Size Range (in) Total Number of links WA-T 1 1/8-2 4 2 1/8-3 1/4 5 3 1/2-4 1/2 6