Description<br /><br />1pcs HSS Spiral Grooved Step Drill Bit 4-32<br /><br />Features :<br />No need for a pilot hole<br />Titanium coated to reduce friction and run cooler<br />Automatically deburr holes as you drill<br />High speed steel，durable.<br />Widely used to cut holes in a variety of material like steel， wood， thin iron， aluminum alloy， insulation boards， PVC sheet，ect<br /><br />Specification :<br />Color : Black (as picture shown)<br />Material : High Speed Steel<br />Surface : Nitrogen treatment (increasing the hardness and abrasion resistance)<br />Shank:Triangle round handle<br />Scop : thin iron plate，aluminum，insulation panels，PVC panels 4mm thickness within the timber.<br />Type: 4-32mm(4，6，8，10，12，14，16，18，20，22，24，26，28，30，32mm)，Shank:25 x 10mm<br />Total Size: 30 x105mm<br /><br />Package included :<br />1 x 4-32mm Spiral Grooved Drill