This tap and die set is designed to thread cutting: tap is used to process internal thread, while the die is for external thread. They are perfect for most hand threading applications<br /><br /> Specifications:<br /><br /> Number of Pieces: 110pc<br /><br /> Material: Tungsten steel(<b>High carbon steel</b>)<br /><br /> Package dimensions: 17.72x13.39x2.56 inches<br /><br /> Shipping weight: 15.45 lbs<br /><br /> Technical Parameters<br /><br /> SAE DIE SIZES:1/4-20; 1/4-24; 1/4-28; 5/16-18; 5/16-24; 3/8-16; 3/8-24; 7/16-14; 7/16-20; 1/2-16; 1/2-20; 9/16-8; 5/8-11; 9/16-12; 3/4-10; 3/4-16; 5/8-18<br /><br /> METRIC DIE SIZES: 6X1.0; 8X1.25; 10X1.5; 10X1.0; 11X1.5; 1/8-27NPT; 1/4-18NPT; 12X1.75; 12X1.25; 14X1.25; 18X1.5<br /><br /> SAE TAP SIZES: 3/4-10; 3/4-10; 3/4-16; 5/8-18; 1/4X18NPT; 1/8-27NPT; 5/16-24; 5/16-18; 1/4-32; 1/4-24; 1/4-28; 1/4-20; 7/16-20; 1/2-13; 1/2-20; 9/16-12; 9/16-18; 5/8-11; 3/8-16; 3/8-24; 7/16-14;<br /><br /> METRIC TAP SIZES; 18X1.5; 14X1.25; 6X1.0; 12-24; 10-32; 6-32; 4-40; 12X1.25; 12X1.75; 8X1.25; 10X1.5; 10X1; 11X1.6; 8-32; 10-24<br /><br /> Package List:<br /><br /> 2 x tap holders (different size)<br /><br /> 1 x T- bar tap wrench<br /><br /> 2 x Die holder (different size)<br /><br /> 35x2 taps<br /><br /> 35 x dies<br /><br /> 1 x Portable Storage Case