Insert lengths included in kits qty. 10 each of :
Master kit
p/n 6600010 (1/4-20x.380 / 1/4-20x.500) (5/16-18x.450 / 5/16-18x.620)
(3/8-16x.520 / 3/8-16x.750)
(7/16-14x.600 / 7/16-14x.870) (1/2-13x.650 / 1/2-13x1.00)
Master kit
p/n 6600020 (1/4-28x.380 / 1/4-28x.500) (5/16-24x.450 / 5/16-24x.620)
(3/8-24x.520 / 3/8-24x.750) (7/16-20x.620 / 7/16-20x.870) (1/2-20x.650 / 1/2-20x1.00)
Master kit p/n 6601000
(M5x0.8x7.6mm / M5x0.8x10mm) (M6x1.0x9.4mm / M6x1.0x12mm)
(M8x1.25x11.7mm / M8x1.25x16.2mm) (M10x1.5x14mm / M10x1.5x20mm) (M12x1.75x16.2mm / M12x1.75x24mm)
Master kit
p/n 6601002
(M5x0.8x7.6mm / M5x0.8x10mm) (M6x1.0x9.4mm / M6x1.0x12mm)
(M8x1.25x11.7mm / M8x1.25x16.2mm) (M10x1.25x14mm / M10x1.25x20mm) (M12x1.5x16.2mm / M12x1.5x24mm)