Home Economy MD Collet Kit Economy MD Collet Kit by Hunter Engineering Economy MD Collet Kit Click to expand Tap to zoom $0.99 Call 800-294-1605 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Economy MD collet kit provides broad coverage for most medium duty applications. Does not handle the large 8 lug/8.7” bore found on some medium duty trucks. 20-3155-1 covers that application and includes 20-3116-1. Includes application chart.