robotic humanoid model

Create a functional, 3D-printable armwrestling training handle based on the reference images. Generate ONLY the rigid handle, no hand, arm, straps, cables, logos or text. Use an ergonomic asymmetric crescent shape with a curved upper section and deep concave palm/cupping area. Add 3 through finger holes following the natural finger arc, approx. 26, 28 and 30 mm diameter, with rounded entrances. Overall size approx. 135×90×40 mm. Add a reinforced 30×7 mm slot for a nylon strap and an 8–10 mm reinforced attachment hole for cable/carabin­er. Use smooth rounded transitions, 2–5 mm fillets, minimum 6 mm walls and 10–15 mm around high-stress areas. Create one solid watertight manifold mesh, no floating parts or internal artifacts. Prioritize mechanical strength, ergonomics and finger retention. Suitable for PETG, nylon or CF filament. Export-ready STL/3MF.