This is a copper hot leather edge polisher stick. Can be used on vegetable tanned leather and chrome tanned leather. But begetable tanned leather has better effect.
One more thing, please bevele the edge and wet it a little with sponge, then use the copper slicker to slick it sometimes, then OK.
Here are the measurement of the grooves:
2mm-5mm grooves are half round, it is suitble to create round edge effect.
6mm groove is a flat one, it is suitble for processing leather belt edge.
The transport company that we use is China Post Air Mail, it takes about 10-15 working days arrive you, and the fee is reasonable.