SP2330BC, 3/4", Galvanized Steel, Multiple Tool Holder, Designed To Hold Screwdrivers & Other Hard To Hold Tools On 1/8" Or 1/4" Perforated Board, Galvanized Coating Gives Excellent Resistance To Corrosion, The 1/2" & 3/4" Inside Diameter Holders Allow Use With A Variety Of Tools, Stock-Pac Loose.