Feature: 25pcs Professional Thread Repair Kit Restoring Damaged Threads. Thread size : M6 X 1 X 8mm Package size : 17.5x9.5x3.5cm Material : high speed steel How to use : 1.Drill out damaged thread using correctly sized drill bit(supplied) 2.Tap re-drilled hole using tap supplied 3.Load coiled insert into applicator 4.Screw coil into casting 5.Using lug breaking tool,break off tag on insert 6.Thread is repaired and ready to use. Package included : 29pcs Thread repair set This set includes : 1 x Drill bit 1 x Thread tap 1 x Insert installation 1 x Lug breaking tool 1 x Installation tool 20x Thread inserts