[How to use the plastic razor blade scraper tool] 1.For the retractable flat blades scraper, Must be used in the middle position to make sure the blade clip firmly.There are three positions:buttom position blade is inside the handle, the mid position for using the scraper,the top positiont for replacing the blades. 2.For the mini saftey scraper with cap, just loosen the knob on the scraper and disassemble the upper cover to replace the blade. [Utility razor blades scrapers] A perfet heavy duty cleaning scraper tool for kitchen Removing Stubborn Residue, burnt food from glass ceramic stove top,cooktop,Induction stove,oven; scraping off caulk and sealant in bathroom,removal stickers,wallpaper,labels,window film,decals,sign,vinyl and other adhesives from car, windows and windshields,vehicle.removing paint, glue, putty or adhesives from glass, tile, walls, floors,carpet,ceiling. [Ergonomic Handle & comfort cleaning scraper]The retractable putty knife scraper features tough handle with comfort sleeve and sturdy shaft.The scraper with safty cap is with handle,not made of Plastic.Thus,very easy to grip no slippage or retracting of the blade when it is used aggressively.The ergonomically curved scraper with handle provides more comfort and control. [Easy to Carry & Safety razor scrapers]The Flat razor scraper is Durable,lightweight and small enough to carry in pocket or toolkit.It is a handy caulking scraper tool or Industrail scraper when doing the cleaning outside.With retractable blade design or safety cap,it is safe to carry on,use or store. Material:Metal + plastic colour:Orange+black Package Contents: 2 * Razor Blade Scraper 10 * Plastic Razor Blade 10 * Metal Razor Blade Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.