This Brake Flaring Tool Set is designed to be used in conjunction with a bench vice. The set comprises of 4 sizes of clamping blocks for holding the brake pipes (3/16” (4.75mm), 14;”, 5/16” & 3/8”) The Turn Key has dies for producing singe & double flares in 4.75mm, 3/16”, 14;”, 5/16” & 3/8”. For single & double flares in Imperial & Metric.