Indef's heavy duty P model specialized for spark proof applications like oil and gas industries. 

Its salient features are- 

• Non-Ferrous parts like chain wheels, chain guides, ratchet wheel and stripping fork eliminates spark generation
• Double ball bearing supported load wheel for smooth operation
• Precision machine case hardened alloy steel gears ensures noiseless operation
• Anti-corrosive power coated zinc plated parts 
• All chain blocks are tested for 50% overload capacity