Bosch collet without clamping nut for ggs 27ggs 27 c bosch 2608570049 these 8mm collets from bosch are available for 6 and 8mm shanks supplied without a clamping nut for use with ggs 27 ggs 27c collet without locking nut 8 mm suitable for ggs 27 ggs 27 c professional pof 500 a pof 600 ace bosch 2608570049 collet without clamping nut 8mm for ggs 27ggs 27 c