General description A drill guide kit designed to assist in correctly and safely drilling out broken M8 and M10 studs and bolts. It is ideal for use on exhaust manifolds, inlet manifolds, cylinder heads, gearboxes, differentials, and other applications where stud size and spacing allow access. The shallow design improves access for drilling in situ on motorcycle engines, cars, and trucks. Technical specifications Size range: 8mm - 10mm studs