100%  and high quality<br />use for home and industrial<br />drop forged， heat treated， high speed steel， fully polish<br />take the guessing out of drilling by supplying the proper depth for you<br /><br />material: high speed steel<br />surface :titanium plated<br />quantity: 1/3/5 pcs<br />1pcs package include:<br />1 x 1/4~1-3/8" hss drill<br /><br />3pcs package include:<br />1pcs 3/16-1/2 stepdrill<br />1pcs 1/4-3/4 step drill<br />1pcs 3/16-7/8 step drill<br /><br />5pcs package include:<br />dimension:<br />#1: 6mm~35mm， 13 step， 78mm(l)<br />#2: 4mm~22mm， 10 step， 75mm(l)<br />#3: 6mm~18mm， 7 step， 62mm(l)<br />#4: 4mm~12mm， 9 step， 70mm(l)<br />#5: 4mm~12mm， 5 step， 62mm(l)<br />box size: 150x105x40mm<br /><br />package included :<br />1 x 6mm~35mm spiral grooved drill<br />1 x 4mm~22mm spiral grooved drill<br />1 x 6mm~18mm spiral grooved drill<br />1 x 4mm~12mm spiral grooved drill<br />1 x 4mm~12mm spiral grooved drill<br />1 x aluminum box<br /><br />note:<br />1.please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.<br />2.due to the difference between different monitors， the picture may not reflect the actual color of the item. thank you!