clearance Thread Repair Kit 1/2in-13 UNC with 12Pcs Threaded Insert Hand Tool for Mechanical Maintenance1/2in-13

1、Suitable for engine and mechanical maintenance for recovery of damaged threads 2、High strength high accuracy it is wear resistant environmentally friendly and non-toxic 3、It can prevent loose bolts and is especially suitable for products requiring high insurance factor 4、Easy to maintain insert the thread into the damaged screw hole then the screw hole can be used normally 5、Specially designed to restore damaged threads strip female threads and form a strong female thread in soft metal