Fast shipping. Shaft is 2.92mm not 3mm but fits in my smaller porting tool collet OK. Rubber is quite hard and tough, you have to press quite hard to remove aluminum material. Tried on some aluminum flat bar and they look perfect for dressing motorcycle port edges. I port a lot of two stroke race motors. So yeh, great product and very reasonable price. I'll be buying more.
all ok, Fast delivery to Czech republic.