pcb drilling phenolic wood backup board

{"cid":"91212833","title":"3.175mm Carbide CNC PCB Drill Bits UC ST ID Shape For PCB Machining","imgUrl":"https:\/\/img.ismap.com\/nimg\/00\/75\/7f066f42c055252dc0061442a6fa-200x200-1.jpg","attrs":{"Price":"negotiable","Brand Name":"Drow","Model Number":"3.175mm Carbide PCB Drill Bits","Minimum Order Quantity":"10pcs","Delivery Time":"Depend on the quantity and requirement. Usually 1~7 workdays if in stock; Over 100pcs need to be negotiated","Certification":"ISO9001","Place of Origin":"Dongguan,China","Payment Terms":"T\/T etc","Supply Ability":"100*1000 pcs\/month","Packaging Details":"1.One plastic pipe pack one piece,10 pcs per group; 2.Put goods enclosed with air bubble paper into box; 3.Other package is accepted according to customer's requirement","Customized Support":"OEM,ODM","Standard":"ISO","Product Type":"PCB Drill Bits","Material":"Tungsten Carbide, 100% New Material","Coating":"diamond coating","Hardness":"HRA 91~93.5","Drill Diameter:":"0.30~7.05mm","Shank Diameter":"3.175mm etc","Usage":"For machining PCB board and circuit board.Milling and drilling.","Applicable material":"Suitable for machining PCB board,circuit board,bakelite board and epoxy board etc","Machining type":"Rough\/Semi-Finishing"}}

{"cid":"91201853","title":"Solid Carbide Corn Teeth 3.175 4mm End Mill Pcb Milling Router Bit CNC Engraving Tools Cutter","imgUrl":"https:\/\/img.ismap.com\/nimg\/e6\/96\/3c76d006b15f01b01461b5c31f33-200x200-1.jpg","attrs":{"Price":"$1-$7\/pc","Brand Name":"OED or OEM","Model Number":"Solid Carbide Corn Teeth","Minimum Order Quantity":"10pcs","Delivery Time":"Standard products in one week, special tools in 45 days","Certification":"ISO 9001: 2008","Place of Origin":"China","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Supply Ability":"5000pcs per month","Packaging Details":"plastic box\/+ Cartons","Material":"Tungsten carbide YL10.2","Type":"End mills","Coating":"None","ISO Grade":"PCD inserts","Item":"Solid Carbide Corn Teeth","\u00d8D":"3.175","L":"45","L1":"22","Re":"0.2"}}