The Inch Screw Checker is a rib tool for finished minute identification of UNC & UNF screws. This timber tool made of heavy-gauge steel is satin-chrome plated, expertly & English made ! . All do-it-yourselfers, handymen, mechanics and maintenance people have too often the frustration and loss of useful time and money by mistakenly identifying a screw. With this undemanding to use, pocket sized tool you can those problems goodbye ! . No more, cursing, and fivefold trips to the hardware store ! . Unlike their impressionable punch parts, these screw checkers, made of laborious gauge steel, will for a very long-wooled time without the worry of wearing out the threads after a small indefinite quantity uses.