The Sealey PS979 is a comprehensive 46-piece harmonic balance puller set designed for extracting flywheels and pulleys from engines and machinery. This multipurpose puller kit provides mechanics and workshop technicians with the essential tools needed for professional bearing, pulley and flywheel removal work. The set includes a robust yoke, 130mm thrust bolt, and three centring adaptors (small, large, and flat) to accommodate different applications. With a working spread range of 40-93mm, this puller set handles a variety of component sizes commonly encountered in automotive and mechanical repair work. A comprehensive selection of bolts is supplied in both imperial and metric specifications, including multiple lengths in 1/4", 5/16", 3/8" thread sizes, plus M8 and M10 metric bolts. Matching washers in three sizes (Ø8mm, Ø10mm, and Ø12mm internal diameter) ensure proper distribution of force during extraction operations. The complete 46-piece set is supplied in a sturdy storage case fo