Chrome-plated, high-alloy steel. Provides quick, efficient winding back of brake pistons. Suitable for use on right-hand thread disc-brake calipers fitted to most European and Japanese cars. Includes 2-sided adaptor (32.5mm BCD x 5.8mm and 23mm BCD x 5.8mm pins). Chrome-plated, high-alloy steel. Provides quick, efficient winding back of brake pistons. Suitable for use on right-hand thread disc-brake calipers fitted to most European and Japanese cars. Includes 2-sided adaptor (32.5mm BCD x 5.8mm and 23mm BCD x 5.8mm pins).