The Lock Technology Bendix/Knorr-Bremse Air Disc Brake Pad Retainer Tool, No. LT891, allows you to safely remove and install Bendix/Knorr-Bremse air disc brake pad retainers without relying solely on hand strength. Works with left and right side calipers. Designed to work with or without caliper shield. Easy grip handle allows you to push the tool down on retainer plate to remove and install retainer pin and retainer plate. The only tool made for servicing Bendix/Knorr-Bremse air disc brakes. Heat treated steel for strength and durability. Patent Pending.