36-inch machined winding bars in 5/8 to 1/2 inch. Longest machined bars we carry. The extra length gives you serious leverage, which helps on heavy commercial springs or any job where you need smooth, controlled quarter-turns. Machined ends fit tight in the cone with minimal play, which is important since a bar slipping out of a wound spring can ruin your day fast. Same taper profile as the 24-inch version, just twelve more inches of reach. They are a pro-level tool, not something You will need for a one-time spring job. Check your cone size before purchasing.