COMFORTABLE & DURABLE : ABS plastic housing with soft TPR grip offers comfortable control and durable use. QUICK BLADE CHANGE: There are 2 positions, the first click extends the blade to “USE” position. The 2nd position is when the blade is all the way up at that is how you could slip out the dull blade and insert a new one. Blade retracts for safe storage. BLADE STORAGE: Blade storage design inside the handle for easy blade access. 4 pcs SK5 razor blades are stored in the rear compartment of each scraper. VERSATILE: Removes paint, glue, putty, or adhesives from glass, tile, wall, floor. Plastic blades are for some special scraping without scratching the surface. EXTRA BLADES: Extra 20 pcs SK5 razor blades & 10 pcs plastic blades are included in separate plastic cases for long time use. ABS plastic housing with soft TPR grip offers comfortable control and durable use. Blade storage design inside the handle for easy blade access and quick blade change design. Removes paint, glue, putty, or adhesives from glass, tile, wall, floor.