7 pcs Manual instruments:5 x file set & 2 x Star Knob Product use: used for processing of hard materials, material processing after quenching, processing of glass products, mold polishing. deburring, trimming chamfering, watch repair, jewelry polishing, wood grinding, bearing mold finishing, etc. Two-color rubberized handle, soft rubber, comfortable to hold, easy to use High quality steel plated corundum Wonderful replacement for your broken one with this Star Knob. Screw on type design for easy install and with surface nice finish for comfortable grip. Product Name: Star Knob; Type: Screw On Color: Black+silver Material: steel+Metal, Plastic Size: file set: 3 x 140mm Star Knob: Head Diameter: 50mm / 1.97 inch Thread Diameter: 8mm / 0.31 inch Total Height: 33mm / 1.3 inch Package Contents: 5 x file set 2 x Star Knob Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.