Bondhus PBLX 13, 13 keys: .050" 1/16" 5/64" 3/32" 7/64" 1/8" 9/64" 5/32" 3/16" 7/32" 1/4" 5/16" 3/8"ProHold® is a plastic plug that is recessed on the side of the hexagonal ball and a small part of the plug protrudes. The plastic plug holds the screw in a secure grip. The position of the plug does not affect the turning function of the tool. Can be angled up to 30°. ProHold® can handle all types of screws, including stainless steel, aluminum, plastic, etc. ProHold® is a safe way to get the screw even in confined spaces during both assembly and disassembly.