BIG-SERT OVERSIZED UNIVERSAL HEAD BOLT 10 inserts of a 30mm length included in kit. Normally used when a helicoil or coil style insert has failed. Two head alignment Dowel for GM, Toyota and Honda. Universal head bolt kits can be used in any application in size available. A simple tool setup is all that is required read more in the instructions. 10 inserts - 11MM X 1.5 X 30MM LENGTH INCLUDED