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.