Tajima Drywall Rasp Super Hard Ceramic Blade 1017 Curved blade with beveled edges:

Curved blade with beveled edges: ideal for concrete

Using a Box Trail Knife eliminates the need for brushing (sanding) between coats

adaptable sanding pad

but can present a challenge during the mudding process

Knurled sleeve with pull ring

Tajima Drywall Rasp Super Hard Ceramic Blade 1017 Curved blade with beveled edges:Double sided drywall rasp. The tetra teeth grabs the material and cuts 20% more than a fixed blade. Non slip elastomer grip for a secure hold. Lightweight. Features Rust free, durable, Ceramic Blades ( 10 times more durable than metal rasp, compared to Tajima's metal blades ) Ideal for super hard gypsum boards Angled rasping for any corners