Based on this product's specifications, here are some alternatives and similar models
Saw Blade for Sabre Saws Hikoki RD10B / S511DF 100 mm, 5 pcs
Summary description:
Replacement saw blades for sabre (reciprocating) saws by Hikoki, compatible with RD10B and S511DF models. Each set contains five 100 mm blades designed for cutting tasks suited to the specified blade length. Intended for general-purpose demolition, pruning or light construction work where a short reciprocating blade is required.