Abstract: A countersink utilizes standard, inexpensive inserts for cutting. Thus the tool never needs sharpening. The inserts may be mounted at several locations on the tool, providing a versatile tool that can handle a wide range of hole sizes.

Abstract: A facing and grooving tool comprising a feed-out tool block installed in a tool slot of a boring bar and a feed-out actuator mounted on the bar around this tool block. A lever on the feed-out actuator is held in a stationary position while the bar rotates, thereby setting the actuating mechanism into operation and driving the cutting edge of a moveable tool section incrementally across a workpiece in a direction perpendicular to the axis of rotation of the bar, producing a flat surface. The actuator may be split for easy installation. Special tool block tips are used for grooving.

Abstract: A single point boring tool using an eccentric for varying the radius of the cutting edge of the tool from the longitudinal axis of the tool to thereby vary the bore being machined. The holder tool can be rotated a full 360.degree., therefore a small eccentric can effect a relatively large variation in bore diameters. The tool holder is rotated after loosening fastener means to obtain the desired radius of bore and then locked in place by tightening the fastener means. Index markings on the tool shaft and tool holder enable unskilled personnel to adjust the bore size with precision.

Abstract: An articulated boat trailer for transporting small boats to and from launching sites. After the boat is launched, the trailer can be folded up onto the rear of the towing automobile without having to remove it from the hitch. Thus, the towing automobile and trailer, can be parked in a normal parking space.