Bought myself after this year's auction Firewood 3 of these wedges and must say that they work 1A ++. Nach18Festmeter Buchepolter with locally 60cm diameter trunks and some vera obligations sees the safety head Although lediert something out but that he may after this performance as well. (BTW, I usually always needed only 1 wedge). But, as mentioned by my colleagues already 5 star you should really take the X39 to hammer as this is provided for these wedges (even if Viskars advertising images aufihren with a steel hammer einhämmert on the wedge).