Primos Hardwood Grunter Deer Call. Primos introduced its first deer grunt call ni 1984. Made from select hardwood, this call was an instant winner. Now the quality and rich tones of old have been combined with a few twists of new technology. The Hardwood Grunter is adjustable to six separate positions, which enables it to create the various calls deer make. Primos has combined the durability, flexibility, and convience of an expandable grunt tube with the rich tones of a high quality hardwood barrel to bring you the Hardwood Grunter. Primos Model No. 701.