SPI Trammel Heads

• Trammels scribe arcs and lay out circles too large for ordinary compasses and dividers and can be used to accurately transfer measurements.
• Beams to attach trammel heads (not included) can be made of wood, aluminum, steel, etc.

# 14-173-9 - Adjustable Trammel

• Supplied with two identical heads and scribes
• Scribes can be removed for sharpening or can be replaced with a pencil or ball point pen
• Use with beams (not included) from 5/8" to 1-1/2"

# 14-172-1 - Precision Adjustable Trammel

• Supplied with one head with fixed scribe and one head with fine adjustment scribe
• Scribes can be replaced with a pencil holder (included)
• Use with beams (not included) from 3/8" to 3/4" or smaller