A custom handmade push dagger with a full tang design and a leather handle is a specialized and unique tool that can have both practical and aesthetic appeal. Let's break down the components you mentioned:

1. Custom Handmade: A custom handmade push dagger indicates that the dagger is crafted by an artisan based on your specifications. This allows for personalized design, materials, and features that match your preferences.

2. Push Dagger: A push dagger is a type of small dagger designed for close-quarters combat. It typically features a T-shaped handle that allows the user to grip it securely while delivering thrusting strikes. Push daggers are compact and intended for self-defense or tactical use.

3. Full Tang Design: A full tang design means that the blade extends through the entire length of the handle. This construction style is known for its durability and strength, making the knife less likely to break under stress.

4. Leather Handle: A leather handle provides a comfortable grip and can add an aesthetic touch to the dagger. Leather wrapping not only enhances the tactile experience but also adds to the overall visual appeal of the weapon.