Based on this product's specifications, here are some alternatives and similar models
Putty Knife AWTools AW27414BL 300 mm Stainless Steel Blade with TPR Handle
Summary description:
AWTools AW27414BL is a 300 mm putty knife with a stainless steel blade and a TPR (thermoplastic rubber) handle. Designed for applying and smoothing fillers, adhesives and putty, the tool offers corrosion resistance from the stainless blade and improved grip and comfort from the TPR handle. Suitable for plastering, woodworking and general renovation tasks.