... , costuming, shoes, socks, quilt Handheld needle metal detector ( TEC-S210 ) Search precision : φ1.2 iron ballDetecting high:12mm technical data1 ... needle detector is high sensitivity. Such as : φ 1.2 Fe > 10mm φ 0.7 x 20mm (steel) > 50mm using method 1 Before use this machine ... Not up and down. Detection rangeUse for detecting the broken needle of all knitting, costuming, shoes, socks, quilt etc.Use ...