Fixing Pin Spring Mandrel Spring Positioning Mandrel Spring Mandrel M12 Description: [Material] The spring indexing piston is made of high hardness, rust resistant stainless steel, which is durable and. [Easy to Use] Indicating plungers when in use, pull out the handle and rotate it 90 degrees and release. [Locking spring screw] Fixing piston with spring, smooth rotation, solidity and long service life. [Applications] Self-locking piston with knob can control the expansion and contraction of the pin by adjusting the handle to achieve indexing, positioning or stop limitation effect. [Small coil thread] M10 or or M16 or M20 threads are available. Specification: Material: stal stainless Size Chart: Overall Length: M10: 51mm or 2.01 inch : 61mm or 2.40in M16: 77mm or 3.03 inch M20: 90mm or 3.54 inch The package includes: 1 Indexing plungers