3 New Leather Hole Punch Pliers 2 Watch Strap Notching Pliers. This is a new pair of 2 watch strap nothing pliers. These cutters are for notching watch straps, eliminating excess inventory. Made of stainless steel, cuts notches 2 mm wide. One of the notching pliers has a center tension spring and the other has a double spring. Each measures approximately 5" (127 mm). Hole Punch Pliers. This is a new pair of leather hole punch pliers. These pliers are designed to punch smaller holes in many sorts of leather. It punches holes of approximately 1.5 mm in diameter. It measures approximately 5 1/2" (140 mm).