Bondhus PBLX 9, 9 keys: 1.5 2.0 2.5 3.0 4.0 5.0 6.0 8.0 10.0 mm.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.