uxcell M4 x 30mm Male Thread Knurled Clamping Knobs Grip Thumb Screw on Type 8 Pcs M4 x 30 Size:M4 x 30 The abrasive mounted stone heads

The abrasive mounted stone heads measure approx

From the Manufacturer Barrel Bolts are designed for security applications on lightweight doors

small constant teeth (24TPI) is for ferrous thin tubing

Black Alloy Steel

uxcell M4 x 30mm Male Thread Knurled Clamping Knobs Grip Thumb Screw on Type 8 Pcs M4 x 30 Size:M4 x 30 The abrasive mounted stone headsuxcell M4 x 30mm Male Thread Knurled Clamping Knobs Grip Thumb Screw on Type 8 Pcs Product Features Thread Diameter: M4; Thread Length: 30mm 1. 18". Safe, secure grip for the ultimate in adjusting and tightening control. Tightly in metal insert insures optimal durability and functionality. Great for saw, drill press, lathe and routing jigs. Package Content: 8 Pcs x Knurled Knob.