We have a eletronische dartboard and darts use now made of metal, because the much better fly. This increases the pressure on impact on the tops. The Orignialspitzen were at oblique incidence on the disc or on impact with the wall instantly destroyed or heavily bent. Was resorted in a row intensified, shorter spikes. This kept much longer than the originals, but 100 tips are quickly depleted with regular use with multiple players. These peaks here are processed a total of harder, have a well-twisted thread and you can after bad Autreffen a few times turn again just. Due to the large package size has long rest with the ordering. But a long tip also means a stronger cushioning effect of darts on impact. In short, I can recommend these tips with a clear conscience, but that they are indestructible, is a rumor. We have per game night already wear from 6-7 points. TIP against wear: Buy the hardware store for 1-2 euros an approximately 2 cm thick Styrofoam plate and hang it behind the dartboard. This measure reduced our consumption considerably :-) ....