The Silca Tyre Lever Premio Set includes two levers, optimised for modern carbon rims. Such rims are easily damaged by metallic levers, especially since tyre fits are tighter than ever these days, so there's more chance of the lever slipping and damaging the bead. Instead, Silca has forged these levers out of strong alloy, with a carbon safe, reinforced nylon shield. If used according to your wheel manufacturer's instructions, specifically to remove and not install your tyres, the job should be fuss free, leaving your rims intact.