These are 20" Turbo Diamond Blades, Laser welded segments, wet or dry cut, 1" arbor. The Diamond segment is 1/8" thick x 5/8" high x 1-9/16" long. These blades were $330.00 new each, buy three for $675.00 and get one free! Hurry these blades won't last long send me your name & phone number and I'll call you back as soon as I get the message.