Features: Steel forging grinding molding, ensures high hardness, good wear resistance, and screw hole design for strong clamping force Anti-skid rubber gasket, make clamp firm, and will the table New jaw, suitable for different size and shape objects In order to ensure that the hole of the log pin is perpendicular to the joint surface, the log pin drilling positioner must be used when making the spanking furniture connected by the log pin. If direct drilling with hand drill will for to hole deflection, using a hole locator can achieve good drilling position. Specification: Name: drilling locator Material: steel Weight: 418 g / 14.7 oz(approx.) Package list: 7 *drill sleeves5/6/7 8/9/10/12 mm 7 *limit rings 5/6/7 8/9/10/12 mm 1 *drill tray 1* hex wrench