How does a Stonehead unlock a door? With a gas torch, of course. Snow and meltwater often find their way into hinges, hasps, bolts and the spaces between doors and their jambs. When overnight temperatures dip to -10C or lower, the result is firmly secured doors that no amount of levering can force open—or at least not without breaking the door. A thick coat of grease or lard reduces the chances of ice locking doors in place, but sometimes even that fails and the Stonehead key is needed. My preferred key is a butane-fuelled weed wand as it produces less heat than a blowtorch and it has much longer reach. A blowtorch is faster but there’s more risk of setting something alight. And both are also ideal for thawing taps before you turn on the indoor stopcocks.