Ensemble de 5 forets à chanfreiner à queue hexagonale de 1/4 pouce, ensemble de forets hélicoïdaux coniques en acier rapide, pour le poinçonnage et le chanfreinage.

【Counterhead Drill Bits】Five different sizes of long, tapered twist drill bits for high drilling efficiency and rapid chip removal. 【Superior Design】Equipped with a hex wrench for easy adjustment of the chamfer position and control of drilling depth. 【Superior Quality】High-speed steel drill bits, robust and heat-resistant; hardened steel chamfer, wear-resistant and durable. 【Compatibility】Universal 1/4-inch (6.3 mm) hex shank, compatible with most handheld drills on the market. 【Applications】Primarily used for punching and chamfering PVC, rubber, and wood.