Impact core for screw nozzles with FEDDY spring

Core for screw nozzles with a spring. SKU-feddy The advantage of this core is to work fr om the inside of the dent, when the master looks at the dent from above. It will also work well in restricted areas wh ere you can't work with regular cores. Works well on the edges of the part. Works great through 2 metals. It also copes well with hard-to-reach dents through an amplifier and sealant. ( without requiring pre-cutting of the sealant) Compatible with all attachments with American thread 5 \ 16 inches. 3 basic rules for long and smooth operation of the device: 1. Do not hit from the side. 2. Do not hit from above. 3. Do not stretch too much (more than 5 cm)