Sealey Thread Repair Kits - Sealey TRM12, Creates a stronger internal thread in soft metals. Ideal for repairing damaged or stripped internal threads. Protects tapped threads against wear and damage. Set includes drill bit, thread tap, insert installation and lug breaking tool. Supplied with three different lengths of thread insert.Model NoTRM12Nett Weight:0.46KgReplacement Inserts:TRM12RThread Lengths:9, 18mm (2 of each), 14mm (x4)Thread Size:M12 x 1.75mm Sealey TRM12 Thread Repair Kit M12x1.75mm