cut masonrynail is good for construction nail..... Cut masonry nailsSize: 2d,4d,6d,8d,10d,12d,16d,20DFinish: Bright, electric galvanized, hot dipped galvanized.Point: blunt.Shank: tapered......It offers even greater pull-out resistance than wire masonry nails. It is ideal for attaching wood members to cinder block walls as well as to fresh concrete.the size as follows :Length 1-1/2" 2" 2-1/4" 2-1 ...