A point of safety forever installed inside of a hole drilled into your rock, to which a metallic hanger is connected, having a gap for a carabiner or ring. Most up-to-date assessment: This is a good initial machine. I happen to be sewing with mine now for eleven several years, http://charlieuvtpj.topbloghub.com/2597235/the-smart-trick-of-vacuum-repair-boulder-colorado-that-nobody-is-discussing