Twister's head turns 360 deg. to get into tight corners and narrow spaces. Steel construction with nonslip Hi-Viz grip. Spring-loaded handle ejects rivet stem automatically. Sets 3/32', 1/8', 5/32', and 3/16' diameter aluminum and steel rivets. 3/32', 1/8', 5/32', and 3/16' nosepieces store in handle.