{"product_id":"micro-drill-bits-hss-10-pack","title":"Micro Drill Bits - HSS Mini Twist Drill Bit 10-Pack for Rotary Tools, Jewelry, PCB \u0026 Models, 0.3mm to 3.9mm","description":"\u003cp\u003eThese micro drill bits are high-speed steel (HSS) mini twist drill bits, sold in packs of 10 bits of one size. Choose any size from 0.3mm to 3.9mm for small, precise holes.\u003c\/p\u003e\u003cp\u003eUse them in a rotary tool, pin vise or small bench drill for PCB repair, jewelry, scale models, crafts, plastic, wood and thin aluminum or steel sheet. Fine bits break easily, so a 10-pack keeps spares on hand.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e micro twist drill bits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e high-speed steel (HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes:\u003c\/strong\u003e 0.3mm to 3.9mm in 0.1mm steps (37 sizes)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack:\u003c\/strong\u003e 10 bits of the size you select\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTools:\u003c\/strong\u003e rotary tools, pin vises, small bench drills\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e PCB, plastic, wood, jewelry metals, thin aluminum and steel sheet\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eChoosing a size\u003c\/h3\u003e\u003cp\u003eSizes are metric. Handy equivalents: 0.8mm is close to 1\/32 in, 1.6mm to 1\/16 in, 2.4mm to 3\/32 in and 3.2mm to 1\/8 in. Check that your chuck or collet closes down to the bit's shank size.\u003c\/p\u003e\u003ch3\u003eBest for\u003c\/h3\u003e\u003cp\u003eModel makers, jewelers and electronics hobbyists drilling tiny holes.\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDo these fit a rotary tool?\u003c\/strong\u003e\u003cbr\u003eYes, in a rotary tool chuck or a collet that matches the bit size. The smallest bits may need a pin vise or a keyless chuck that closes fully.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the pack one size or assorted?\u003c\/strong\u003e\u003cbr\u003eOne size. Each pack has 10 bits of the diameter you select.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I drill steel?\u003c\/strong\u003e\u003cbr\u003eThin steel sheet, yes, at low pressure. Use cutting oil and back the bit out often to clear chips.\u003c\/p\u003e","brand":"Belvik Tools","offers":[{"title":"0.4mm (10-Pack)","offer_id":50638965309505,"sku":"200043261:201336457#10pcs 0.4mm","price":8.99,"currency_code":"USD","in_stock":true},{"title":"0.3mm (10-Pack)","offer_id":50638965342273,"sku":"200043261:8846#10pcs 0.3mm","price":9.99,"currency_code":"USD","in_stock":true},{"title":"0.8mm (10-Pack)","offer_id":50638965375041,"sku":"200043261:100016939#10pcs 0.8mm","price":8.99,"currency_code":"USD","in_stock":true},{"title":"0.7mm (10-Pack)","offer_id":50638965407809,"sku":"200043261:200661877#10pcs 0.7mm","price":8.99,"currency_code":"USD","in_stock":true},{"title":"0.6mm (10-Pack)","offer_id":50638965440577,"sku":"200043261:201299346#10pcs 0.6mm","price":8.99,"currency_code":"USD","in_stock":true},{"title":"0.5mm (10-Pack)","offer_id":50638965473345,"sku":"200043261:201336458#10pcs 0.5mm","price":8.99,"currency_code":"USD","in_stock":true},{"title":"2.0mm 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