while the 23" model (HS-137-24) has a 21" cutting edge and 5 PPI teeth

What does the DDIN DNBC-1 blanket clamp hold

reducing the likelihood of significant under or over torque

twist-resistant blade anchor

Can I attach a headlamp to this helmet

DDIN Blanket Clamps – Spring-Tension Insulating Blanket Clamp (DNBC-1) work pants while the 23" model (HS-137-24)The DDIN DNBC 1 Blanket Clamp is a spring tension clamp designed to securely hold insulating blankets and rubber cover ups in place during live line utility work. Notched grooves in the body prevent line hose from sliding. Made in the USA. Key Features Holds insulating blankets and rubber cover ups keeps cover up devices securely in position during live line work Spring tension operation provides consistent clamping force without manual adjustment