Thumbdrive Glock 19/23 Right Hand Holster. ThumbDrive is the safest and fastest-drawing Level II holster available on the market today. It features exclusive thumb-activated safety that secures weapon at all times, and with the optional Chop-BlockTM feature, helps prevent others from removing it during a weapon retention struggle. Includes Belt Slide and Paddle. Belt Slide adjusts to fit up to 2.25in belts.