The large knurled screw is simply screwed into the endpin so that it prevents the strap from slipping off your guitar. Additionally, these pins, like our standard pins, are completely compatible with the Schaller Security Lock System.

Includes: Endpin, Knurled Screw, Attachment Screw & Protective Felt

Features

• Set of 2
• Gold
• Compatible with Schaller security locks
• Easy to install