Since 1982, the B-LOC brand has been synonymous with world class quality, engineering excellence and unrivaled customer support. All B-LOC keyless shaft/hub locking devices are manufactured in strict accordance with relevant International Standards, and are available in a variety of styles and sizes — 1/4" up to 40" and larger, both inch and metric, to suit any application. Fenner Drives also has the capability to produce special B-LOC Keyless Bushings, even in small quantity production runs.