Amateur carpenters who have laid out the cuts in a stair stringer (the zig-zag structural support for the steps) know the queasy feeling that bubbles up at the prospect of this job. There’s the simple ...

String trimmers get into spots larger lawn mowers can’t reach, like beneath bushes or right up against fences. They can delicately trim around flower beds or slash through overgrown weeds. Flipped on ...