Lightweight staple gun housing made of ABS for durability. Stapler core slides out by squeezing the tabs and pulling, giving access to staple channel for easy and fast bottom load. Stapler core stays in the housing, making it difficult to lose. Staple indicator window allows user to know if stapler is loaded and also turns red when the stapler is almost out of staples. Stapler has a 4" measuring scale molded in.