Fits All M9 x .75 Metric Thread Jacks Designed to Work with SCHALLER? Style Strap Locks but Easily Convertible to Other Strap Lock Brands or Non Strap Lock Pins (see conversion chart in FAQs) Optional to Not Use Strap Locks and Use our Strap Pin for Easier On-Off of Strap Strong Solid Brass Color-Black Finish Compatible With L.R. BAGGS? Pickup Output Jacks, K&K SOUND? Universal Sound Board Pickup (Hot Spot, Big Shot, Big Twin, Twin Spot) L.R. BAGGS?, SCHALLER?, K&K SOUND? and all other third party brand names are trademarks of their respective owners. Music Nomad LLC is not affiliated with those owners, nor claims ownership of those marks.