Suitable for the removal of broken studs & bolts. Supplied with centring pilots for Ø4.75-9.75mm studs,  drills,  extractor shafts & nuts. Ideal for engine manifold studs. Drill 
 Sizes: 3.2,  4.8,  6.4,  8,  8.7mm Minimum Stud 
 Size: 4.75mm Maximum.. .                                             
