The Red Dirt Derby pinewood derby weight drilling tool and tungsten weight kit has everything you need to achieve perfectly placed weights to maximize your car’s speed. The T-Tool pinewood derby weight placement tool makes drilling perfectly sized weight holes simple. The drilling tool is engineered to help you achieve the ideal balance and center of gravity necessary for maximum speed without the need for a drill press or complicated measurements. The T-Tool attaches in seconds and can be secured with a standard clamp. It is designed for use with 3/8” and 25/64” drill bits to fit standard sized tungsten pinewood derby car weights. It is compatible with wooden car bodies up to 1.75” wide. The 3-ounce tungsten weights fit perfectly in the 3/8” diameter holes made by the T-Tool. The variety of weight sizes allow for incremental weight increases and precise placement necessary to achieve maximum speed. Weights are made from safe, non-toxic tungsten offering superior density compared to other metal weights. The kit includes (1) T-Tool weight placement tool, (5) ½ oz weights, (1) ¼ oz weight and (2) 1/8 oz weights. Wooden block and drill bit not included. In the event that the tool is tight fitting onto the wooden block, the block can be narrowed slightly using sand paper until the tool does fit. All Red Dirt Derby products are expertly engineered with one goal - speed.