Snow Peak offers four different sizes of their solid steel indestructible tent stakes that are impossible to bend.
The silver tent stake on the left in the below image is an aftermarket option. Upon meeting up some below ground rock, this silver tent stake gave in and easily lost its form with a few hits from the hammer.
The black Snow Peak tent stake here is designed to go head to head with below ground rock and win the battle or at a minimum retain a linear shape.
Snow Peak offers these stakes in the following sizes:
3 oz. 20 cm
6 oz. 30 cm
12 oz. 40 cm
19 0z. 50 cm
The 30 cm works well for all around camping. While the longer versions could be more ideal in deep sand or deep snow.
While these Snow Peak tent stakes are an extra cost, they will be the last set of stakes you will ever buy and you will no longer be tossing anymore of those cheap silver tent stakes in the trash.