Sharp tough bimetal blades. Will not shatter. Easily cuts steel, stainless steel, nail-embedded wood, hardwood flooring, reinforced bar, conduit, cast-iron, and pipe. Standard 1/2" shank. Model No. S318RC thru S110R have 1 blade per card and model No. 456R thru 118R have 5 blades per clamshell, and model No. OSB656R thru OSB818R have 50 bldes per bulk box. No. S318RC: 3", 18TPI, metal cutting No. S418R: 4", 18TPI, metal cutting No. S606R: 6", 6TPI, wood cutting No. S610R: 6", 10TPI, wood cutting No. S636RP: 6", 6TPI, plaster cutting No. S614R: 6", 14TPI, metal cutting No. S618R: 6", 18TPI, metal cutting No. S624R: 6", 24TPI, metal cutting No. S656R: 6", 6TPI, metal cutting No. S810R: 8", 10/14TPI, wood cutting No. S818R: 8", 18TPI, metal cutting No. S956R: 9", 6TPI, wood cutting No. S156R: 12", 6TPI, wood cutting No. S110R: 12", 10/14TPI, metal cutting No. 456RP: 4", 6TPI, plaster cutting No. 414R: 4", 14TPI, metal cutting No. 418R: 4", 18TPI, metal cutting No. 424R: 4", 24TPI, metal cutting No. 634R: 6", 4TPI, wood cutting No. 606R: 6", 6TPI, wood cutting No. 636RP: 6", 6TPI, plaster cutting No. 610R: 6", 10TPI, wood cutting No. 614R: 6", 14TPI, metal cutting No. 618R: 6", 18TPI, metal cutting No. 624R: 6", 24TPI, metal cutting No. 656R: 6", 6TPI, wood cutting No. 818R: 8", 18TPI, metal cutting No. 810R: 8", 10/14TPI, wood cutting No. 956R: 9", 6TPI, wood cutting No. 156R: 12", 6TPI, wood cutting No. 110R: 12", 10/14TPI No. 118R: 12", 18TPI, metal cutting No. OSB65GR: 6", 6TPI, wood cutting No. OSB810R: 8", 10TPI, wood cutting No. OSB956R: 9", 6TPI, wood cutting No. OSB15GR: 12", 6TPI, wood cutting No. OSB414R: 4", 14TPI, metal cutting No. OSB418R: 4", 18TPI, metal cutting No. OSB618R: 6", 18TPI, metal cutting No. OSB614R: 6", 14TPI, metal cutting No. OSB624R: 6", 24TPI, metal cutting No. OSB818R: 8", 18TPI, metal cutting