This Snap-On SIMFM21 deep impact socket features a 21mm metric size with a 3/8" drive and 6-point Flank Drive® design for strong fastener engagement. The deep design allows access to extended fasteners and studs while providing durability for high-torque impact applications. Manufactured in the USA and built for automotive and mechanical environments.

• Brand: Snap-On
• Model: SIMFM21
• Socket Size: 21mm
• Drive Size: 3/8"
• Type: Deep Impact Socket
• Point Style: 6 Point
• Flank Drive® Design
• Measurement Standard: Metric
• snap on simfm21 21mm deep impact socket 3/8 drive 6 point flank drive metric usa mechanic tool automotive garage equipment