KM.RB290 Latching Bolt without Locking Lock and Hex Collar. Material: steel burnished application: locking bolts in the basic design for easy and quick positioning of perforated rails and various workpieces. The locking and unlocking is done by hand by pulling up the plastic button. Locking pin material: hardened stainless steel and chemically nickel-plated. Threaded sleeve: burnished steel. Knurled button: polyamide black. Thread drive: without thread shape: fine thread. Locking lock: without RoHS compliant: yes