platinum drywall tools flat box set with 10 & 12 inch boxes platinum drywall tools the platinum drywall tools flat box set is an excellent choice for drywall contractors that want to speed up their drywall finishing. the tools are built to last with all stainless steel and anodized aluminum parts. the 10-inch and 12-inch box combination is the most common configuration. the 42" flat box handle will easily reach 9-foot ceilings. the platinum brand of automatic taping and drywall finishing tools are premium grade. are you ready to step up your drywall finishing? included in this kit 10" and 12" flat boxes 42" box handle compound pump with filler