21 pcs Impact Spiral Twist Socket Set for Damaged Nut & Bolt Removal  51421 The twist socket set features a specialized spiral profile that bites into the head of a damaged bolt, providing exceptional grip where standard sockets fail. Material: High-grade Chrome Molybdenum (CR-MO) steel. Drive: 1/4" and 3/8" drive with adapters for power tool compatibility. Set Includes: 4x 1/4" Drive Twist Sockets (35mm): 6, 7, 8, 9mm 13x 3/8" Drive Twist Sockets (35mm): 1/4", 5/16", 3/8", 10mm, 7/16", 12mm, 1/2", 13mm, 9/16", 5/8", 17mm, 11/16", 3/4" 1x 1/4" Hex to 1/4" Drive Adapter (65mm) 1x 1/4" Hex to 3/8" Drive Adapter (65mm) 2x Punch Bars (75mm) Made in China Packing:   Code: 506175 International shipment available. Please ask for price.