Fenix M-Lok Rail Mount A6061-T6 Aluminum. The quick release roller allows you to mount a flashlight for a secure fit. Made of hard-anodized aluminum this rail mount is strong and lightweight perfect for harsh conditions where durability counts. Hard-anodized anti-abrasive finish. Patented roller allows for quick assembly and disassembly. Compatible with flashlight body diameters 23.5mm - 26mm with a head less than 40mm. Specifications for Fenix ALG-16 M-Lok Rail Mount: Manufacturer: Fenix Color: Matte Black Fabric/Material: High Grade Aluminum Finish: Anodized Mount Type: M-LOK Gun Type: Rifle Features of Fenix ALG-16 M-Lok Rail Mount Premium type HAIII hard-anodized anti-abrasive finish Patented roller allows for quick assembly and disassembly. Compatible with flashlight body diameters of 23.5-26mm and a head less than 40mm including C7 E28R E35R HT18 HT30R PD32 V2.0 PD35 V3.0 PD36R PD36R PD36R PRO PD36 TAC PD40R V2.0 TK16 V2.0 TK20R V2.0 TK22 TAC TK26R TK30 WF26R Package Contents: Fenix ALG-16 M-Lok Rail Mount Fenix ALG-16: ALG-16 M-Lok Rail Mount A6061-T6 Aluminum