The Matco Tools 100-pc 1/4" and 3/8" Drive ADV Impact Socket Bundle, No. ADVBUN22, features a 150-degree chamfer on the socket drive end that allows for an ideal grab, constant pressure, and ease of use. The Opti-Torque system applies torque to the fastener sides, reducing corner round-off. High-visibility size markings enable for quick identification for fast and efficient size selection.