diagram of a drill bit

{"title":"Safety Parking Barrier Steel Bollard Post With Reflective Tape","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/57\/f2\/075ca9d7ba2d8b49e6b225550aec-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"HaoXinCheng","Model Number":"Parking Barrier Bollard Post","Minimum Order Quantity":"100","Delivery Time":"7~15 working days","Certification":"CE & ISO","Place of Origin":"Cangzhou, Hebei","Payment Terms":"L\/C, D\/A, D\/P, T\/T","Supply Ability":"5000000Pcs\/Per Month","Packaging Details":"Carton,Pallet","Product name":"Steel Safety Parking Barrier Bollard Post","Color":"White Yellow","Material Capabilities":"Steel, Stainless Steel, Brass, Aluminum","Certificate":"ISO9001:2015","application":"For indoor and outdoor security","Transport Package":"Bubble Bag + Carton + Wooden Case"}}

{"title":"FR4 OSP HASL lead free Quick Turn PCB Prototypes Electronic Circuit Boards","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/9c\/e8\/5900b31020c62c47faeb5665f517-200x200-1.jpg","attrs":{"Price":"USD 0.22-3.99","Brand Name":"CKS","Model Number":"CKS-Customized","Minimum Order Quantity":"1 Piece\/Pieces","Delivery Time":"90-120 work days","Certification":"ISO9001","Place of Origin":"CHINA","Payment Terms":"L\/C, Western Union, MoneyGram, T\/T","Supply Ability":"300000 Pieces per Month","Packaging Details":"41CM*22.5CM*10.5CM","Surface Finishing":"OSP\/LEAD FREE HASL","Base Material":"FR-4","Surface treatment":"OSP: 0.5-0.5um HASL: 2-40um Lead free HASL: 2-40um ENIG: Au 1-10U\u2019\u2019 ENEPIG: PB 2-5U\u2019\u2019\/ Au 1-8U\u2019\u2019 Immersion Tin:0.8-1.2um Immersion silver: 0.1-1.2um Peelable blue mask","Min. Line Width":"4mil","Min. Line Spacing":"4mil","Board Thickness":"1.6mm","Min. Hole Size":"0.2mm","Copper Thickness":"1OZ, 0.5OZ-6OZ","Inpedence control tolerence":"\u00b15%","PCBA service":"One Stop Turnkey PCBA Service"}}