CL-6-HRP-S Carr Lane Manufacturing Hand-Retractable Plunger, Knurled Head, Standard Plunger, Stainless Steel: Thread 3/8-16
Spring-loaded plunger that locks in retracted position. To lock, pull knurled knob back and turn 90?. Standard plunger has a slight taper on plunger tip for easy alignment. Also available with a radiused Delrin plunger (slightly larger plunger diameter and lighter spring force). Available in steel or stainless steel. Made in USA.