The Robertson head, AKA the square head, dates again to 1907. Common in copyright and lengthy viewed as a curiosity while in the U.S., it’s turning out to be additional widespread below as the square head resists slipping a lot better than the Phillips head. Also ensure that the thickness https://emilianogheax.bcbloggers.com/28911700/5-easy-facts-about-types-of-screw-head-punch-described