The PS-F-0.5C Pedestal Base Clamping Fork secures a 1.0 in. (25.4 mm) diameter optical pedestal or pedestal base optical post holder anywhere on an optical table. It includes a 1/4-20 cap-head screw that is held captive in the slot of the fork so that it can't fall out. This stainless steel clamping fork provides positioning flexibility with a 0.5 in. (12.7 mm) long slot for secure mounting of optical pedestals. This product is also available in 10-piece saving pack PS-F-0.5C-PK .