Features: Provide strong internal thread which resist heat and corrosion when installed. Once fitted their position is held by the radial pressure between the coils and the flanks of the drilled hole. Manufactured from precision stainless steel wire for strength, wearproof and durability. Increase connection strength and fatigue resistance due to the elasticity of wire thread inserts. Great choice for restoring damaged threads in steel, iron, aluminum and anywhere metal threads become stripped, crossed or damaged. Specifications: Model: M6 Material: Stainless steel Weight: Approx. 155g Package Includes: 50 x M6*1.0*1.5D Wire Thread Inserts 1 x Twist Drill Bits 1 x Wrench 1 x Thread Taps 1 x Breaking Pin Tool Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.