For fixing the brake inner cable at the required length from the outer casing holder unit
BR-IM85-F/IM-86-F : 101 mm
BR-IM45-F/IM55-F/IM80-F/IM81-F : 109 mm
BR-IM45-R/IM55-R/IM80-R/IM81-R : 99 mm
Can be used for 3 different lengths (101 mm/109 mm/99 mm)