G29-34 G2934 Galt Skull Trephine with Removable Handle for Use with Hudson Brace 1" Diameter G29-33 G2933 Galt Skull Trephine with Removable Handle for Use with Hudson Brace 7/8" Diameter G29-32 G2932 Galt Skull Trephine with Removable Handle for Use with Hudson Brace 3/4" Diameter G29-31 G2931 Galt Skull Trephine with Removable Handle for Use with Hudson Brace 5/8" Diameter G29-30 G2930 Galt Skull Trephine with Removable Handle for Use with Hudson Brace 1/2" Diameter