Description<br />This is the New HSS Steel Large Step Cone Drill Titanium Bit Set Hole Cutter， which is made from high quality HSS steel， and with the Titanium coated to reduce friction and heat. It is very suitable for using to cut holes in a variety of materials including steel， brass， wood， plastic， etc.<br />Features    <br />- Color: As the picture shown.<br />- Material: High Speed Steel with Cobalt Coated.<br />- This set replaces 50 individual drill sets.<br />- Made by Long life high speed steel.<br />- Self starting - no need for a pilot hole.<br />- Cobalt coated to reduce friction and run cooler.<br />- Automatically deburrs holes as you drill.<br />- Includes protective padded aluminum case.<br />5Pcs Black Specifications <br />- 1/4 to 1 3/8 Drill Bit: 10 Steps (1/4， 3/8&amp;amp;amp;rdquo;， 1/2， 5/8， 3/4， 7/8， 1， 1 1/8， 1 1/4， 1 3/8).<br />- 3/16 to 7/8 Drill Bit: 12 Steps (3/16， 1/4， 5/16， 3/8， 7/16， 1/2， 9/16， 5/8， 11/16， 3/4， 13/16， 7/8).<br />- 1/4 to 3/4 Drill Bit: 9 Steps (1/4， 5/16， 3/8， 7/16， 1/2， 9/16， 5/8， 11/16， 3/4).<br />- 1/8 to 1/2 Drill Bit: 13 Steps (1/8， 5/32， 3/16， 7/32， 1/4， 9/32， 5/16， 11/32， 3/8， 13/32， 7/16， 15/32， 1/2).<br />- 3/16 to 1/2 Drill Bit: 6 Steps (3/16， 1/4， 5/16， 3/8， 7/16， 1/2).<br />5 x Drill Bits<br />1 x Aluminum Case<br />3Pcs Gold:<br />Length<br />4-12mm length: Approx. 6.3cm/ 2.48inch<br />4-20mm length: Approx. 7.3cm/ 2.87inch<br />4-32mm length: Approx. 10cm/ 3.94inch<br />Specification <br />4-12mm Hole Sizes in 2mm Steps (5 steps)<br />4-20mm Hole Sizes in 2mm Steps (9 steps)<br />4-32mm Hole Sizes in 2mm Steps (15 steps)<br />6Pcs Silver:<br />1 * cylindrical - diameter 7mm<br />1 * cylindrical - diameter 3mm<br />1 * cylindrical - rounded front - diameter 6mm <br />1 * round - diameter 3mm<br />1 * pointed - diameter 3mm<br />1 * conical cylindrical - diameter 3mm<br />13Pcs Silver&amp;amp;amp;Gold:<br />Features    <br />- Material: High-speed Steel.<br />- Sizes: 1.5mm / 2.0mm / 2.5mm / 3.0mm / 3.2mm / 3.5mm / 4mm / 4.5mm / 4.8mm / 5.0mm / 5.5mm / 6mm / 6.5mm.<br />- 1/4&amp;amp;quot; hex shank titanium coated drill bits for longer life.<br />- Perfect for both professionals and casual DIY-ers.<br />- Suitable for steel， wood， plastic， etc.<br />- It can be used with cordless screwdriver.<br />Including: 1 set tools