304 Stainless Steel Ball M4 Blind Half Hole Ball Female Thread Steel Ball 6~60mm
15mm 15.9mm 17mm 18mm 19mm 20mm 22mm 25mm 30mm 35mm 40mm 45mm 50mm 60mm. Material: 304 Stainless Steel. This Series Of Drilling Balls Has A Complete Range Of Models And A Wide Range Of Applications, With A Smooth Surface, No Burrs, Polishing, And Polishing.